How do we know when we are being set on a different path, or if we are just quitting?

I have been struggling with my medical training. I have alot of knowledge but I lack experience and I daily question my competence. The more I feel incompetent, the more incompetent I become in front of my crew. Things I should have been solid in a long time ago I mess up everytime I touch them. I do not know if I have time to fix these issues in time.

I thought this was the path that God intended for me ( I came to this late in life) but lately I wonder if he is not trying to tell me to find another vocation. I am truly struggling with depression and feelings of failure and wanting to quit. WHen I feel like this I do not just feel bad about my mistakes, I feel useless and like I have no place.

Is the devil corrupting my thought , or am I being told that I have another purpose and that the thing that I thought I wanted - God simply does not want for me?

My husband, my only support system, really, is shipping off to Afghanistan and I feel very alone in this doubt and struggle that I am experiencing.

I would love any advice, as well as your prayers to guide my hands and my heart. Also any scripture that you might add would be very helpful to me.
Thank you all!

Did you pray about your job before you got it,Pray that if God wants you there that it will go smooth
and easy for you,I started a job once and it was so hard at first, then I prated God you are gonna have to make this smooth or I am gonna Quit,well it went smoothly after that,also do you pray He will use you at work for his purpose?That way it won,t be depressing, but joyful
Lord bless you with joy,in Jesus name Amen

It's funny how people get this mentality 'oh its difficult, God must not want me to do it'. I'm sorry, but I've read the bible and no where in there do i see 'and God will make everything He wills a breeze'. In fact, God often puts us in difficult positions on purpose. How do you expect to learn, grow, or get good at anything if you never have to work hard? How do appreciate the things you get, or do, if its all just handed to you?
Really you just have to learn to accept the fact that you may struggle in some areas. Doesn't mean you're bad at the profession, or you shouldn't be doing it, just means you have to work a little harder in some areas than other people may have to. You're really just doing whats called 'self fulfilled prophecy'. You convince yourself you can't, you don't give it your all and work hard, then when you screw up or fail you go 'see, i knew i couldn't do it' when you never really gave it 100% to begin with. Push those negative feelings aside, bolster yourself up and get your butt in there and prove to yourself you can do it.
May also stop questioning God and start trusting. Hard work and faith. Now go study

Heavenly Father, ElizaBeth needs you. She is being lied to by Satan and in her weakness she is buying into the lies.

Jesus let her realize that in her weakness you are strong, she in competent in you.

You have told us in your Word, "for God has not given us the spirit of fear but of power and of love and of a sound mind." (2 Timothy 1:7) Let Elizabeth embrace your promise.

God you know she is concerned about her husband, who is shipping off to Afghanistan, embrace her so she will know she is not alone. Holy Father you promised to send your Comforter and I ask you now to send him to ElizaBeth.

Jesus draw her close, mature her spiritually, strengthen her so she will be able to do the work you have called her to. Relieve the depression, doubt, fear, remorse, uncertainly and the frustration. Let her call your name and know that you are God. Amen.

Jesus may she learn to ask you for all the strength, wisdon, love and support she needs. May she run to your word when she is feeling lonely.
In Jesus Name Amen

Praying for you and all needed in Jesus, also for your hubby.

God bless.
pickles

Thank you all for your encouragement/prayers/advice! I am touched by your kindness.
NMSmile... I want to learn to pray like you. Its very powerful. I really feel your words and I feel your strength.
Damombomb- you are right I need to remember to have joy in it. Ugly you are right about the self fulfilling prophecy. Pickles thank you for your sweet prayers for my husband and for me, and shekaniah, thank you for reminding me where to put my attention, and for your kindness.