If the medical place you go won’t do swabs, you can order them yourself to gather yourself and return at 24/7labkit. This is the way that you are going to know if what’s inside your mouth is HSV or not. There really isn’t another way. People can get HSV on the roof of the mouth,yes. I doubt that the tongue issues are related to herpes. outbreaks orally usually last around a week to 10 days.