Help!

Okay so after finishing the deed with my boyfriend, he noticed when getting up a thick white, cum looking discharge in my vagina. How do I know if it is his or mine? It looks like his & after googling, it says women’s is usually a thin, milky looking substance. But i also know everyone is different so how do i figure this out!

disclaimer: if it is his & i were to become pregnant it wouldn’t be an issue, just unexpected. it would just be nice if i had something to go on.