(HELP) Unprotected sex while on period

So, I had unprotected sex with my significant other on the 2nd day of my period and he came inside of me. My period continued for the rest of the week, per usual. I am currently not on birth control. I have heard from multiple women that you are very unlikely to get pregnant while on your period. I know the chances are always there if you have unprotected sex, but should I be more worried? Do you think my chances of pregnancy are high?

This was a one time thing, we usually use protection, it was a mistake in the heat of the moment.

(My periods usually last 5-7 days and I usually ovulate about a 5-7 days after my period has ended.)