15 days late and no ovulation

i tend to be irregular and didn’t have a period for the month of july. my bf and i have protective sex ALWAYS. we had sex on august 19-20 and he inserted it ONCE without a condom after he gave me oral but we both know he didn’t come before. could i get pregnant with that still? especially bc i was on my “fertile days” i also feel like i haven’t ovulated after my august period :( im dry and have not seeing any kind of discharge. is that why i haven’t gotten my period? i’m too nervous to take a test, i don’t wanna have a positive test :(