Burning sensation

Anyone can tell me if they have had a burning sensation after having sex only , that can last for a few minutes and the feeling of burning is more when peeing? It is normal? (We always have sex for 1-2 hours non stopping) can be the reason too ?

I only feel this after sex, I’m not sure it can be a STI since I was a virgin until I meet my current boyfriend.and before starting to have sex with him he got tested for STDs. And was clean

Thanks for your answers 😊