Having constant throbbing ha and passing out had a mri eeg ekg ct scan urine test blood test nothing shows no history of migrains what could be wrong?

Glad you had tests: If you've had all the workup of which you've spoken, then the serious diseases should be ruled out. Therefore, you can see a neurologist who specializes in headaches and try some different therapeutic alternatives to relieve your headache. Find a neurolgist specializing in headaches in charlotte and keep pursuing the cause of your headaches.