A few days ago, me and my boyfriend were having sex and during intercourse, he noticed some blood coming out. It was very faint, kind of a pinkish colour, and there was not very much at all. I did not feel any pain during it, and im pretty sure nothing was torn or ripped. However, im worried about waht this could be, because neither of us have an sti, and i heard it could be due to pregnancy, which im worried about? please help me!