abnormal uterine bleeding
"Got my first and last depo shot in September. I got the shot during my usual spotting that happens right before my period. After the shot, spotting stops, period is a no show, and my PMS symptoms go away. Sounds great, right? 10 days after the shot and I start getting brown discharge that has gotten heavier and occasionally more pink with no end in sight (19 days and counting). This is accompanied by cramps, ache, and zero sex drive, but who'd wanna have sex with all that nasty brown discharge. Now I know how the shot is so effective at preventing pregnancy."