Found out early

I found out I was pregnant 1 day after my missed period the line was very bold not faint at all and it’s so weird to me because that would mean I ovulated maybe two weeks prior so I’m finding out I’m pregnant after having intercourse maybe two weeks ago?? But I’m the medical world they add two extra weeks and say I’m 4. It’s really confusing😩 if I was 4 weeks that would mean I had intercourse on my period & if you tell your partner how far along you are they do the math and think “we didn’t have sex then” .