Can I still be pregnant if I had sex and my boyfriend ejected in me while I was on my period?

I know this is a messy question, sorry but I had sex on my second day of my period and I was bleeding pretty heavy and last night he ejected in me. I woke up and I was still having cramps and was bleeding, but I was wondering if I could still be pregnant? I'm only asking cause I understand a semen can live for a few days and I've read that there is still a chance of this occuring.