I'm 18 and have had sex before, I've recently gone on the injection from the pill, I haven't had a period in 3 months because of the injection and my pcos, but now I'm only bleeding when I get wet, and its becoming a pain for having sex, it doesn't bleed a lot and not for very long, is it just my injection or something else? I'm due another injection in 6 days.

Before you get your next injection I would bring up these concerns with your doctor. I know that the injection does do odd things to a Woman's body so it could be part and parcel of it all. Hard to say.