It's different for each person. As long as it doesn't turn bright red, or you don't get really bad cramping with it, you should be fine. If it gets worse just call your doctor or go in.
Mine was a one time blob of nastyness lol. But some ppl have it for days
Ok I've had it since Monday I'm and off
As long as it isn't red your fine
Ok! Idk why but I'm extremely paranoid this time around! Did this happen to anyone else