I am a 18 year old black female 5'6 about 165lb. I had a "early" period 2 weeks before my period was supposed to come. Very very light bleeding for maybe 3 days with some light cramping. My period was supposed to come on april 28th didnt start any type of bleeding until may 8th no heavy bleeding pink yeast at first then a little patch of blood with serious back pain & cramps, may 9th no blood or pink yeast but cramps, may 10th no blood & some cramping constipation, may 11th light cramping, some blood, constipation, & nausea. Today may 12th is just cramping. I was on depo for 2 years & got off last year around may. I've been sexually active the whole time no abortions or anything. My partner & i dont use condoms or birth control & have sex about 3 times a day with out using the pull out method. I have changed the way & sleep & some smells do upset my stomach like meat & cigarettes but i am not fatigued & i dont have sore breast. I doubt im pregnant. Could this be something else?