Hi I m 21 years old and female. I woke up feeling very nauseous and weak. I have not thrown up yet but the feeling comes and goes. I did not notice the white coating on my tongue til the afternoon. It is not thick and most goes away when I scrape it. I do have a broken tooth and my dentist said there s an abcess starting to form in my gums above the tooth. I do not drink or smoke. I ve never had a white tongue before. I read it could be dehydration because I drink water rarely.