Burning inside vagina during & after sex?!

So my husband and I just finished having sex.. during foreplay, he was fingering me and it burned really bad INSIDE of my vagina- like up near my cervix. We proceeded to have sex anyway, and the whole time it was getting worse and worse.. finally he finished. It's been about 15 minutes since we finished and it STILL burns in there.

Things to take into consideration-

Neither of us has ever had nor do we have any STIs/STDs .. I know for sure it's not BV, not a YI, and not a UTI (just treated for one recently & no symptoms) .. We do not use any condoms, lube or toys .. There is a possibility I could be pregnant (waiting for AF before I test) .. This is the only time this has ever happened to me and I have been sexually active for 6 years. HELP?!