sex help * edited

Okkk so me and my bf had sex about a month ago he pulled out wayyyy before he was supposed to cum and I gave him oral sex and he cummed. He didn't have precum cuz he didn't have sex before that sooo.. as in there was no sperm in the the pre cum because he did not ejaculate prior.
Spare me the stress ladies 🙏🏻
Whenever I think about my period coming it's always late 
and when I don't even think about it , it just comes and I don't even have to worry 
Help girls