What happened when you got off the pill?

I'm probably going to get off the birth control pill within the next 2-3 months so that we can ttc. 
I've been on birth control since I was like 13 and I'm really nervous that my body is going to go nuts. 
Right now, I have normal periods, slight cramps, very minimal moodiness, very minimal skin problems, and a little bit of weight gain that I'm trying to get rid of. I'm hoping that getting off the pill will help with that too.. I'm trying to lose 15 lbs before getting pregnant. 
Thoughts?