pain during sex

Charlotte•Louise
So last night me and my boyfriend had sex, it was like every other time but then my vagina just starting stining. Kinda felt like a burning sensation. The sex started to become more & more uncomfortable, eventually I had to stop. 
It some words felt like he stretched me or something. 
I just want some advice? I love my boyfriend a lot it's not nice to stop in the middle of having sex I felt bad but the pain was that bad I had to stop. 
Is this normal or???