Etonogestrel
"I'm 18 years old and I got the birth control implant months ago. The first 2 weeks were horrible for me my arm was sore and itchy and just in pain. Yes the implant does really effect your emotions I found myself getting sad or mad really fast, and cried for no reason for the first weeks. Other then that it's great! Don't feel it at all in my arm works 100% !!! Everyone needs to stop complaining about it, I mean it's messing with your hormones I'd expect it to make us emotional, everyone's experience is different, my sister got the stomach flu her first week. If you're really light in weight your period should be light and probably not even come. I just spot, but then again it's not 100% that you're not gonna get it or it's gonna be light."