pain during sex

I have been sexually active for 7 months now and my boyfriend is my first and only. we have been together for 10 months now but i don’t get ant pleasure from sex (p in v) and it feels like it hurts a bit whenever we have sex. i kind of wish him to come fast so its over. i love him like crazy but i don’t know whats wrong and he is sensitive so he gets sad and disappointed in himself so i try bot to tell him. what to do and any guesses on why?

(i got checked and there is nothing wrong but i have yeast infection now due to antibiotics and its not going away no matter which doctor i go)