Anyone having trouble losing weight while on hormonal contraception?

Hello.. I’ve been on the pill over a year, yasmin to be exact.. and Im having real trouble to lose weight.. it’s like i haven gained any but it takes sooooo much more effort to lose even 2 pounds. before being on the pill i would lose 2 pound in a week by just dieting.. right now its like, impossible.. anyone experiencing this??
I swear i try to diet really hard and cont calories.. and it doesnt work anymore.