Help me!!!

So I have a crazy question/concern? Me and my fiancé are not trying to have a baby at the moment, we already have two kids and that’s more than enough for us right now. Warning TMI, so I apologize ahead of time, we had unprotected sex toward the ending of my period and he ejaculated in me (sorry to be blunt about it😬) and I checked my ovulation day which is not till the 14 or so the calendar says but I am still nervous about getting pregnant. It seems as if my other two pregnancies were around my birthday, both kids birthdays are in June and the dates would indicate that I conceived them around my birthday both times I became pregnant so at this point I am freaking out . Should I worry or am I in the clear? Thanks!