I had unprotected sex on the first day of my period. before then I had been on birthcontrol for about a month an a half, and i started to get some sort of yeast infection so i stopped with one week left on my pill pack. about four days after i stopped taking my pills i got my period. that same day I had unprotected sex. my period then stopped a day and a half after the firts day of my period (first day was saturday, second was sunday, and third was the beginning of Monday) My period is very regular, but i tried to skip this cycle by continuing on the new pill pack...is there a chance that I could be pregnant? My period was already really light on the first day, somewhat heavy the second, and light the third. I took a pregnancy test two days after my period stopped, it was negative. is there a chance though???