Sex during ovulation...

So its my week of ovulation. (You know that 5 days stretch where the chances of getting pregnant are medium to high risk)

Well my high risk ovulation day is in two days.

Yesterday I had sex (basiclaly 3 times in the same session we both came a few times)

***I've heard that a guys cum is stronger the first time he cums. And that its not as much fertilizing flow after the second time he cums** IS THIS TRUE?

Because the third time he came, he did NOT pull out fully. I was on top and his dick was about half way in (not all the way deep because he was trying to obviously pull out )

Could that have gotten me pregnant?