my last period was the 17th of July. ive had morning sickness, sensitivity in nipples, boobs are more fuller, heartburn/indigestion, swollen feet and ankles, feel more fuller in my vagina, feel of uti but not uti, diarrhea 5times/day, and been peeing like 10times/day. store bought test when first took it was positive the next 2 was negative, doctor pee test and blood test was negative. this was taken around the 20th of Aug. Am i pregnant?