Burning post sex!!! TMI

So I have been married to my husband for the best 11months of my life and our intimacy is passionate. However my only issue is post sex! Making love is great but I noticed that about 90% of the time he ejaculated in me, upon him withdrawing his penis there is a strong burning sensation about 2 inches from my vaginal opening... Like pepper!!!! I can't even cuddle after sex I have to always go wash up with cold water.... And even so the burning is somewhat still there for at least 30mins with some swelling.... I have had 2 known yeast infections in the last 11months (one had no signs or symptoms found from regular vag swab for physical, an the other is non confirmed yeast infection or bacterial vaginosis because when they did the swab I had already taking oral diflucan the day before).... I feel normal otherwise down there now... No known yeast infections now. But still burning after sex... What is it and am I the only one?????