Burning after sex

I’ve dealt with this for years and I really haven’t found out what the problem is. Almost every time after me and my fiancée have sex I have a burning around my vagina and inside. It happened with my previous boyfriend too. It makes me not want to have sex as often as I want to and it makes sex a chore not something I can enjoy. When I talked to a doctor they said I probably wasn’t wet enough but I feel like I’m always pretty wet and he says I’m wet and even using lube there’s been some times where it happened. I want to have a normal sex life but this burning is making it really difficult and idk what to do.