I have had a coated tongue for the past five months. I was under extreme stress, worry, and anxiety. Even thought that I had got HIV from receiving oral sex. Since then, I have had a 10 week and six months negative HIV test. About a month after my exposure, I noticed that my tongue was white. Now five months later, I feel like the roof of my mouth is dry and has a clear mucus layer, and my tongue has not changed. The coating is primarily on the back. It feels like my papillae are furry. If I use a scraper or salt and then dry mouthwash it looks normal for a bit. What do you think?