Am I overthinking?

So I haven’t specifically been TTC, but have had unprotected sex multiple times however I have never fallen pregnant. Sometimes my partner would pull out, sometimes he wouldn’t.

I’m starting to worry a little. Like I said I haven’t specifically been trying, but just a tad concerned that it hasn’t happened?

Am I panicking for no reason? To get pregnant does a conscious effort need to be made?

Any advice?