My 25 year old son has been suffering from disequilibrium for eight months. It is continuous. He has been to two ENTs has had a vng, multiple hearing tests, has seen a general practioner, a cervical spine specialist, is seeing a neurologist,has has epley treatments, acupuncture,vestibular therapy, has been given steroids, antibiotics, lipoflavinoids all to no avail. He is a full time student,and recently has become depressed. This all started after he got a flu shot although I have been told it is a coincidence. We are desperate for help please