Hi, You need to consider being assessed by a neurologist and ENT specialist if you have not previously been seen by these specialist. These doctors would be able to conduct a full assessment of the neurological system as well of the ears, nose and throat to see if any cause can be identified. Imaging such as an MRI, may need to be done to take a look at the brain and head to make sure there is no structural cause. If a reversible cause is found then this can be treated. The most common causes are benign paroxysmal positional vertigo, Meniere disease and vestibular neuronitis. None of these are life threatening but if they are identified then you can be appropriately identified. I hope this helps. Let me know if I can assist you further. Regards, Dr. Michelle Gibson James