I had sexual intercourse between 5/13/17 and 5/25/17. I used my birth control as instructed as per usual. I have had 2 periods, both on the correct day, for the same duration (5-6 days), same color, slightly lighter than usual (mine are usually EXTREMELY heavy, these two months have been moderately heavy) with clots. I took 6 pregnancy tests, 5 urine, 1 blood, all negative. I have no symptoms of pregnancy. I have PCOS as well. At this point, can I eliminate the possibility of pregnancy? I'm stressing out about what seems to be nothing.