first time having sex without protection and i’m not on the pill

ok so i’ve had sex before and i was on the pill then, but i got off a while ago because i wasn’t having sex. i just recently had sex on the 1st and we didn’t use protection he pulled out but my friend told me that a guys pre cum after he has already came once can have sperm in it. i didn’t realize it at the time but i was also ovulating. i took the morning after pill about 1 and a half days later but i’m scared. what should i do?