Help sex isn't good anymore

Since august when I have sex with my boyfriend I have really bad burning pains to the point where I have to stop him. I went to the gyno and he told me I had a yeast infection, even though I didn't have any symptoms of one. I took the medication he gave me and I am still having the pain. I have no stds and I don't know what's wrong with me 🤷🏼‍♀️😭