What it takes to enter heaven is given by God, not earned by men. Forgiveness of sins is free to the one who believes. It is a gift you receive by faith, not one you earn by works. Not only that, if you as a Christian are trying to keep God’s favor through the spiritual disciplines, you never know when you’ve done enough.
You can rest from your worry like a child sleeping in his bed at night because all the work is done for you in Jesus.