Advice .??

ok so i have irregular periods and my boyfriend and i recently had sex, with a condom.. he didn’t precum in the condom so i gave him a blow job..

It’s weird because his cum is clear and watery so when he came, he came on my tits but some dropped down to my mons pubis, ( by my pubic hair area)

I know this is a dumb ass question but i cant get pregnant right ? But my period was supposed to come 2 days ago and hasn’t come at all?