I'm on Yasmin, and it hasn't affected my weight at all. In fact, I'm told that it's the pill most dancers go on, for that precise reason.

My weight can fluctuate as much as six pounds in a day. I used to be a dancer, so I understand your concern, but try not to worry about it. Three pounds is really very, very little. It could come from anything, such as drinking a lot of water, eating a big meal, or even if you hadn't pooped yet that day before you weighed yourself. Try not to worry about it.