My last period was on february 20. On march 26th, april 1st, and april 13th i notice spots of blood. The first week of april i had very light cramps and my nipples feel a little sore. I went to the OB/gyn on april 8th and took a pee test, it came back negative. I notice no weight gain or pregnancy symptoms, excepting i do feel like im going to throw up but i dont. Could i be pregnant?