I'm worried

I got my period this month on the second day of my period my partner and I had unprotected sex (we always do) and my period was cut short. I guess he stopped my period. Then a couple of days later I was peeing and I saw like light bright blood the size of seed. Now I'm worried that I could be pregnant. Any suggestions on what it could be. I don't have any symptoms besides fatigue but I'm always tired.