Over the past 3 yrs. I've had dizziness, migraines, spasm, cognitive & memory problems, etc. Neg MRI, LP, nerve conduction test. What's wrong with me?

Chronic headaches. can be treated in various ways at headache clinics at some local hospitals. Your doc may refer you or search one out yourself. You can also consider natural approaches such as a food sensitivity panel from Great Plains Laboratory in KS. Peace and good health. Biofeedback and clinical hypnosis are also possibilities.