What should I do ?

For the past year, I’ve be very uncomfortable. I’ve gotten tested multiple times but the doctor says it’s nothing but a yeast infection. I get a treatment and goes away but the feeling comes back within two weeks. Idk what it could be. I want my bf to get tested which he doesn’t have a problem with but when I called a place they said that they don’t normally test for that. They only test for std’s. But how can I know if he’s just giving me the yeast infection back to me.