The only reason I am going to go on it is because of my acne, especially my acne on my back. No matter what topical creams I use, it always come back, which makes me think it is hormonal. I heard birth control can help with this. But I also heard that if you take it, you could be on your period for over a month, and you can gain alot of weight. Is this true? And do you think I should go on it?