i've been irregular for years...i havent had my period in 3 months...when i do get my periods, sometimes the pain is so bad, i've thrown up and passed out..the bleeding is never heavy though. its actually almost black, its hardly ever red..even the first day..and sometimes before i get it or when its coming there is pressure down there, and i feel like i have to pee all the time! its so annoying...any1 know what it could be