So I sex July 7,10,&20. I got a normal period on July 26. During August I got sick with tonsilitis and was out on antibiotics,steriod,and 800mg of Ibuprofen. I then got spotting the 28th of August and put a tampon in which got enough blood to bleed through. It had been two days and I passed a fairly medium size clot but no more blood. Could I be preganant? Or am I just paranoid. I took a test the day before on Aug 27 and it came back negative. Did I just have a weird 2day period or???