Air Force Question what would happen if.....?

It shouldn't change anything. I was in basic and tech school with plenty of guys that were not married and had children. If you want her to be able to come live with you and to receive a housing allowance you may need to be married, not quite sure how they work that one, but it will not disqualify you from joining or anything like that. I think you should tell your recruiter, because their might be a chance that you can make more money from the jump, I'm not sure if they will pay you more if your not married and the child is not born but you should look into it. Good Luck in your training and in parenthood.