I am 17 years old, I'm on the depo shot. I've been on the shot for almost a year now. After 4 months of using the shot my periods started to be irregular. I got streap throat at the begging of February and my doctor had given me anitbiotics. I had unprtected sex after a week of using the antibiotics and I started bleeding in the middle of intercourse. I thought it was my period, but now I'm starting to wonder and I'm a bit worried because my period has not stopped since then. It was heavy that night, I woke up the next morning no bleeding for he next two days, then I started bleeding again, it gets lighter then heavier and stops sometimes for a few hours to a day, then starts again. Why am I having a period this long ? It has been 3 weeks. I know it's not a misscarriage. I've had one before and I had only bleed for a week. Please help. Thanks.

You're really going to need to see your doctor about this. There's no way that anyone on the internet can accurately tell you what's going on.

Please see your doctor.

Good luck.