Afraid and embarrassing!

okay... I have not told a soul this. my boyfriends a virgin, and I'm not. he wants to lose it to me, but last time I had sex before him, I queefed during doggy style. I'm doing "keegle" exercises to help it. but how how the hell do I tell him? what if i don't tell him, and I don't have sex for awhile, will it help it stop? I've searched about it, and it says that it's air coming out when the penis is pushed back and in. just wondering if it helps to not have sex for awhile? please help! thanks in advance!