could I be pregnant?

Leah
Ok! So I haven't had sex for 3 months now... and finally yesterday (the day after my period ended) I had unprotected sex and he ejaculated in me.
So my question is is it possible that I could be pregnant? Like I just feel weird maybe bc I haven't done anything in a while and I'm freaking out but seriously is it possible to even get pregnant the Day after your period ends?
I'm freaking out help! (Oh FYI I didn't randomly do anyone unprotected it was (and this is gonna sound kinda dumb) my ex bf)