birth control
"Was on the shot for about 2 years. Loved it. Not bleeding, no cramps, and I still had my very active sex life. Towards the end of that 2 years I realized I gained about 20lbs!!!! That's a lot for me. I have very high metabolism. Then my hair started to thin out. I had to stop taking it. 
I can't seem to lose the weight, which is annoying. Now I'm on birth control pills. I don't like it at all. No sex drive and some acne and serious mood swings. Did I mention no sex drive! If the pills don't work after 3 months I am going to consider going back to the shot."