peace, keep reading IF YOU feel an obsessive desire to not read this and skip over it, or obsessive movements are not allowing you to read and understand, question why something would want to keep you from this.
faith is a measure of belief, it is defined as the more confident you are about it, the more you have.
Nobody ever prescribed doing obsessive movements as a way to be close to God. believing you must do these things to, be so close, is actually a problem of having little faith.
some lines from the Bible which could relate are,
"no one could pluck you from the hand He holds you in"
"they asked jesus, 'why couldn't we cast out the demon... ...jesus replied, 'because of your lack of faith' then did himself"
If you believe being a Christian makes you saved, this would make it a fact in your world, not in moments. This salvation is based solely on believing and trusting. It does not change if you do things a certain way, walk through the door a certain way, or step on a specific place. With faith, you could walk through the door anyway you want. step anywhere wanted, walk down the isle without having to do anything particular, because it is not through these actions you were saved, it is through your belief in jesus you believe you are saved. Also to go even further on this, this belief in small actions getting you saved would actually be disrespectful to your faith, because it means relying on another means to access the grace He gave you than means you were given. Meaning these movements, though not inherently sin, represents a contrary belief to the belief He gave to you. The outcome of them is believing in them as a means of salvation other than God, which means you are providing beliefs other than what He says to you, trusting in yourself more than God. This does make these movements not sin, but an actual insult to the salvation He gave you, because the salvation was meant to allow you to relax and feel saved even when you made mistakes, not turn your life into a difficult thing where you have to be more on guard against mistakes, your feelings about these movements are opposing everything He did for you and wants you to be, do you really think anyone in heaven is looking down and saying, "he better walk this right or he doesn't deserve receiving salvation," when it says they are up there saying, "no man is perfect and they have to be forgiven of there wrong doings to be saved, and there's no other way salvation will work," of course not. Have more faith! the decision you made when you are nine is with you every moment since, or it was not of God. It doesn't matter if you make a certain move or not, decide to do something or not, the Bible teaches, it means trying to do what is good in the sight of God, and being forgiven for mistakes you and everybody else WILL make. Try to see maintaining faith as sillier to building a resistance to something, believe it does not matter for 15 seconds if you are currently only going 5 without doing a compulsion thinking it determines salvation. Work your way to believing you've already done all requirements for salvation, hold this belief for as long as you can every singe time.
The statutes in scripture almost always represents something, eating unfit food represent a willingness to not take your gift of body seriously enough to take care of it, not resting when prescribed represents seeing importance in things achievable through work than God. The idea of loving thy neighbor is recognition of us all being a representation of a part of our ancestors, each person not the same but a different part of who they were. Not acting in anger is like resting to, representing nothing which can make you angry is more important than violating this statute from God. Your compulsive actions, what do they represent? hearing you speak of them, they appear to represent, lack of faith in being told to trust He saves you even without your being perfect, so in the same way we could view the scripture your actions represent something like all these statues, and when viewed, it becomes visible, your compulsions are directly opposed to the general meaning behind the scriptures.
Do not worry about selling a soul. Genesis 9, says He told all mankind he would demand their blood (some versions say soul or use the two side by side suggesting interchangeability) and it also says blood is the soul of the animal. Even if you did sell your soul, this scripture suggests He would show up and demand it anyhow, from you, or anyone who has it, even the enemy.
So selling your soul does not work, if you do believe you have made such a deal, go back on it (your soul is still in you if you are alive), say on second thought, I will keep my soul for us, (God and you), accept telling a lie, and be forgiven for saying something which was not true by jesus, it is better than giving your soul. (do not bare false witness against thy neighbor, the enemy is not your neighbor, this wouldn't even violate this statute).
If you hear an input which says not to listen or believe me, remember in the exodus (or read) it was discussed between Moses and the congregation, He was with both, but what made Moses to be listened to over them was He actually spoke to moses, unlike the congregation He was simply with. So remember actually hearing the voice of God is highly reserved and rare, even if He is with many, if something comes and tells you something in the world, it is probably not him. (First time speaking to moses there was a bush on fire but not being burnt as proof, when moses returned to his brothers, be stuck in his hand in his back side to cause, then instantly cure leprosy the next time as proof to them moses was coming from the living God.) It has never been sinful to ask for proof from a being manifesting they are He and not something coming to deceive you, when in person, and it is actually preferred in scripture to do so, as it indicates you are not unreserved enough to follow anything and nothing, which leads people to idolatry which is displeasing. Usual evidence involves fire or manifesting food if your hungry. I don't know of anywhere in scripture where He provides evidence which is not enough to convince the person of his identity, He knows each person individually and what they would need to see.
Remember your salvation does not rely on what you do "for it is not on good works alone men are saved, it is by having faith".
And as for being a "disabled" person, the disorder you claim you have causes obsession without identifiable reason, you have a reason for your movements, you are not "OCD", you are simply uneased and unsure. Acting out of fear. If you do try to stop doing this habit realizing it is not necessary for salvation, remember the actions themselves are not sinful, this would be the next thing for the enemy to make you feel worthless in my experience, without the belief and intention of depending your salvation on the motions, there's nothing sinful with doing them trying to stop but still in habit, without the belief it determines your salvation.
Never fear, your soul is GOD'S and God's ONLY. 
