birth control
"I got Nexplanon in November 2012, I didn't know when it started working because I was in bootcamp but I don't think I got my period for 3-4 months. When I do get my period, I don't know how long it will last because the 1st one I got was 4 days, and the one after was 2 weeks. The only REALLY BAD thing I've found is weight gain. I've been able to get rid of some of the weight, but not enough to where I feel comfortable with myself again. I think I gained 22lbs I went from 116lbs to 138lbs. Aside from that, it works great."