Lost virginity without protection

I am 22 years old and was fooling around with my bf until it got a little bit too serious and he ended up penetrating me without protection. Basically he was just inserting his penis in my vagina to see how far he could get, but since it hurt too much he ended up pulling it out after like his penis was midway. It happened 04/19 and i usually get my period around the 21st. i bleed that night and the following day, but i think that the second day resembled more as to when i get my period. Do you think that i could get pregnant if he never came and he was just inserting it inside to try and break my hymen and i was around the date of getting my period?