Hey Rose,
I think the time after GCS is a time where things get unsettled for a while. It's like "I need this, I want this! I can't wait." Life is on hold holding your breath until it happens and all of a sudden, it's done. It is normal for a little whiplash. Give it some time.
My other answer means no offense, but it comes from my atheistic point of view. I think that when you are powerless to have the body your are supposed to have, it is a total lack of control to deal with. Looking at some higher power could possibly be a way to cope with this. Once the surgery is done, that need might not be as strong. I don't think we can force ourselves to believe in a certain religious viewpoint. Either we believe or we don't. Some people hear atheist or agnostic and jump to 'sinner' or 'bad person.' Actually, no, it is just not logical for some to be religious. Give yourself time to settle out, figure out what makes sense, and be happy with it. It's more important to just be a good person, I think.