TMI S3X related question

hi all! i’ve been with my bf for 4 1/2 years, and every time we have sex and he finishes inside me, my vagina BURNS like hell especially when i go pee after sex it stings soooo bad! we used condoms because i got paranoid about pregnancy at some point (even tho im on nexplanon), and it didn’t hurt after when i would try to pee after intercourse. we tried again without a condom and it stings the same when i try to pee after intercourse! is this normal or should i see a dr?