Am I just paranoid?

My boyfriend and i finally had a little alone time today. This is my first time doing the dirty, so you imagine I don’t know much. Anyway it hurt way to much so we decided to stop, so my boyfriend took of his condom. I got out of the mood, but my boyfriend (asked first) tried getting me back on. We could still do other things. Anyway he came once after a little and then decided to grind on me unprotectedly. I’ve always been paranoid about getting pregnant with precum, but what about a little cum on the tip. Like could there be any left over that can get me pregnant?

Please help, I’m paranoid.