I'm 18 and on steady birth control. I had a period 2 weeks ago (although it wasn't time, according to my pack) and since then I've been spotting everyday. It's weird though because I spot once, just enough to make a quarter size spot on my underwear, then it's gone. When it happens I feel a slight cramp and then it's done. Is this normal? I had sex for the first time a week ago, could this be a factor as well?