Suggest Treatment For Vaginal Discharge And Stomach Cramps

OK, i havent had my cycle since march 20th somewhere around that date, now its may the 13th of 2011. Ive taken like 5 to 6 pregnacy tests including blood test, and they all came back negative. I be having cramping pains in my lower part of my stomach, sometimes a palelish whiteish reddish discharge. I also like a milkish watery discharge too. I dont please help