Susan
Of all the tests that I have had not one of them shows anything wrong, all results are normal. I have had, Cat Scans, Mri's, Pet Scans and Spec Scans. You name it and it has been done. Doctors will treat the symptoms. I have been told that I have Epilepsy. The only way for a seizure to happen so that doctors can see it is to put me in the hospital and lower my medication. I'm not saying that this is what is wrong but I would highly suggest that you see a neurologist if you haven't already done so.