I ve been having two periods a month. It happened as a kid and they put me on the pill . My pill Has changed a few times since. It then started happening again beginning of this year where I was having a period more or less every 2 weeks, so they changed my pill again. It s been normal for a few months and now it s doing it again. When it starts I just get almost general period pains, the only way I can describe is it feels like my ovaries hurt, it s only a dull ache though. When I first come on for the second time it s like a black discharge , there is no odour to it. Then a couple days later, it s pure clean red blood . Not like horrible period blood.