am I pregnant????

I'm freaking out me and my boyfriend had unprotected sex during my fertile window but he pulled out and he is very consistent with this method. We then did it again last night not during my fertile window and when I got home I had blood on my underwear and it look like period blood. I then had light flow today and it now has stopped. If it is my period it is a week early. I am pretty sure I am not pregnant. I feel like my period is light because we had sex and it usually is light when we have sex during my period. So could I be pregnant or am I just freaking out