am i pregnant?????

i had sex with my boyfriend 3 days ago, he didn’t use a condom but he didn’t cum, im on the pill and my period is due today... but it hasn’t arrived yet!! i’m kinda worried bc last night when i was peeing it was burning and all blood clots and blood came out??? was that my period???? and now when i pee and wipe there is small white/brown chunks of discharge??! am i pregnant ahh help i’m rly scared i take the pill daily at the same time everyday