No problem is too small for the Lord boojie!
Sounds like you are really struggeling with this too.
Provided both churches teach the pure Gospel, which one was feeding you, allowing you to minister to others, and be ministered to yourself the most? I believe I would start with that. I'm sure members from the previous church would welcome you back. Church is not a club you become a member of, its the house of God where believers meet to lift one another up and minister to each other. Think about it on those terms and PRAY about asking God where He wants you to be.
Will be praying with you about that...OK?
Grace and Peace!