I would say you need to take a few days off the nookie!
You are probably rubbed raw and just need time to heal.
If no better in say a week then see you Dr and if you are still worried request further tests for STD but don't stress!
It burns because you were too dry. It is not an std. Next time you get dry during sex, try some water based lube.
He probably rubbed you raw.. I would say in a few days you should feel better, this happen to me the first time I had sex. It was on my honeymoon, and I was really nervous and didnt get very wet, I was sore for a few days.
Good luck,