I am 24, have been on birth control for a year, exercise regularly (and vigorously) and I have gone from weighing 150 to 163 in like a month! I have no idea why, I try to watch what I eat, and I drink lots of water. I am pretty sure I'm not pregnant, I'm on the pill and had my last period about 2 weeks ago.... I don't understand why I am gaining so much weight so FAST. I don't have any pain or stomach problems. But the weight gain is definitely noticeable and really creating a problem with my self esteem and the way I feel about myself. I have noticed my stomach does seem to be pooching out a little bit more but it mostly just seems like fat. I am really distressed about this and honestly don't know what to do. Any ideas? Thanks!