Turning your back on God isn't a very healthy way to deal with your confusion.
Saying that someone has turned their back on God is like saying someone turned their back on Santa Claus. If you believe in God, fine, worship accordingly. But if someone else doesn't see reasonable proof of God's existence, that in no way constitutes turning their back on him.
EDIT: You have to have a relationship with someone before you can turn your back on them. Even if I assume God exists, we did not know him as witnesses therefore we cannot have turned our backs on him. If someone proceeds to find God upon leaving the JWs, that's another matter.