So my boyfriend and I always have unprotected sex, well a week ago we were having sex and I was on top, he pushed me off real fast and finished. Today I am 2 days late for my period, I took a pregnancy test but it came back negative. Maybe it's to soon to find out? My boobs are not sore like they usually are when I'm about to start, but my nipples have gotten darker. Just need opinions.... thanks.