Sounds like a bumper sticker, because it is one actually but, take it to the Lord in prayer.
It's called backsliding. Sometimes a Christian who is new to the way thinks as soon as they rise from that baptismal water they'll have this epiphany of rightness.
Like some brilliant happening will tap them on the shoulder and say, well done! Now that you're born again all that old stuff will fall away and new things will shine for you.
And when it doesn't we wonder if Heaven paid attention to the change we made for ourselves in Jesus name.
It's easy to do what we always did prior to finding Christ. To fall back, to back-slide.
Some people think, and perhaps they've even had it actually happen, that as soon as they accept Jesus everything in them feels righteous. When they accept on faith they've become an eternally saved reborn , new, creature, that they're going to feel that physically, emotionally, mentally.
That, "coming home" contentedness that wells inside and lets them know peace where before there was only chaos and the urge to do wicked things.
And when that doesn't happen the doubt creeps in. Then that carnal rational intellect starts to look at what they've been asked to believe. And they pick it apart as that little voice inside says, does any of it make sense?
But that's the adversary working his tricks. The opposer to God's will and truth. Any opportunity to nudge doubt in there if we're feeling week and he'll take advantage. It's a test. Think on Job. Talk about test.
And only the individual knows for sure. That's why I say, take it to the Lord in prayer. There's no formula for doing that the "right" way. God is everywhere at all times. You can drop to your knees in your bedroom and weep like a baby if you want to. You can follow scripture and fix up a prayer closet in your home. Or, take a long walk in nature, God's tapestry, and speak to God in your thoughts in a person to spirit call.
Let it all out. Release everything. Some people let it all go, that old life, when they're baptized. It's as if when they rise from the water they've just washed away a ton of weight on their shoulders and layers of filth from their body. They literally feel born anew as a new person who left their old self in the water below.
Some people get saved when they're really not ready. Some think, why not? It's like that old story about Pascal's wager. Only they bet on it and think it's a balm that fools God and will change their life. But they're not called. Not really.
When it's right you'll feel it.
And that isn't saying you weren't called. Not by any means. But if you feel you're useless to the Lord now because of something you did after you were saved, you're having doubts. And that doesn't mean you're not truly called to Christ. It can mean that you feel so bad about what you think you did that could disappoint the power that knew you before you were born, that you can't face him. That guilt can cripple in many ways but especially one's faith that God can love them past that.
But he does.
Pray. Look in the mirror and realize God didn't make a mistake when he made you. When Jesus can forgive you before you were born for any and all that you'd do wrong, don't ever let yourself believe he can't forgive what you've done now.
God loves you. That's not a platitude that's a fact.
Now, since you're made in the image and likeness of "dad', you've got to love yourself. Because hey, you're the house of the holy. The holy spirit of the source of all that is, was, shall be, lives in you now.
Take care of that. Take care of yourself. (HUG) God be with you.
(Yes, preachy. But hey, this is a Christian forum. It would be wrong if it weren't from time to time.
)