advice?

i had unprotected sex a few days ago while on my period. i know it’s stupid but i just got off my birth control & i have yellowish brown discharge. just wondering if that’s normal after a period & getting off the pill. (he pulled out) so i’m worried about pregnancy but it’s a very low chance i might be just from precum if there was any. (precum only lasts up to 5 days & i had unprotected sex on the 27th) i just got off my period today