I have known a number of couples that wanted to get pregnant, for a few of them, it seemed to be impossible. So much sex that they were wearing things out, nothing. Doctors tested and found one of them about sterile. Not quite, but almost. On the other hand I have known a few who swear that they only got the head in, and only for a second, and she got pregnant.
Hard to predict.
Congratulations to getting what you wanted.