Omygosh! This sounds horrible, so sorry you are going through this. A good friend of mine had all of these symptoms, and it turns out she has worms! Round worms, that can get into your cranial cavaties. The white tongue, is a dead give-away! Get another cat scan of your head, as well as blood tests for round worms. (* Stool test are outdated, and not reliable. ) Good luck! This condition can become very serious, there doctors here in USA are not very educated on parasites, unfortunately. I have been diagnosed with ascariasi- so many were in my lungs that they collapsed And I almost died! So, take care of yourself!