I’m on day 3 of missed period

I’m on day 3 of missed period. My husband and I have been trying to conceive for a few months now.

I know for a fact as of Oct 2nd I was not pregnant.

Him and I had a lot of sex in between Oct 2nd to now. But the only thing is, during that time period I wasn’t ovulating. Or so I think. I was supposed to start my period Saturday but it still hasn’t started yet, and I know if I would’ve conceived between the time period of Oct 2nd to now, it would be too early to show up on the pregnancy test. Do you think I could’ve conceived??