I normally have very light but on schedule periods with cramps the day before and then a three day cycle every 20-22 days average is 20. I was 43 days late for my period. I took 4 pregnancy tests and all were negative I even went to the hospital on Tuesday they did a qualitative blood test but said negative. I had nausea and bloating change of eating habits breast tenderness symptoms of pregnancy. last night I started cramping severely then bleeding within an hour, nothing like any period I have had before. I m still cramping in a lot of pain and bleeding. I passed a large clot of blood that first hour and nothing since but still bleeding. I am also rh negative