My boyfriend and I were both virgins until a couple of days ago. We had protected sex and he pulled out before he ejaculated. The next morning when I woke up, I noticed some [what I think is] dried blood on my underwear. For the rest of the day, I didn't bleed at all. The morning after that I woke up and noticed the same thing. While I was at the store later that day I felt my underwear were a little wet and sure enough, there was blood. When I woke up this morning and went to the bathroom, I wiped myself and noticed blood and it looked like I was on my period. But my period started March 2 and they're usually regular so I don't know what this could mean.
Someone please help me. Is this a sign of infection or possible pregnancy?