Period while pregnant?!

So tomorrow I'm supposed to be ending my period. I have not even started... Two days ago we decided to have really rough sex to help get it started.. Their was a "little" bit of blood on his penis. So we thought OK , we're not pregnant. Later on realized I haven't bleed since we had sex. Thought that was strange... Last night we did it again. Lots of blood. So we thought for sure this time. I put a tampon in last night and this morning went to go change it and nothing! Not one single drop of blood. This is completely not normal for me. I have a pretty heavy flow for 7 days.

What do you think? Possibly pregnant? I haven't taken a test yet.