They did all the possible GI tests , such as upper and lower GI, irritable bowel disease treatment
, blood tests for viral infections, brain MRI, gall bladder,liver,kidney ultrasound you name it. I finally saw a neurologist and she was the one who did the EEG. I didn't respond to Imitrex injections at all. She tired to knock me out and calm me down at bedtime by giving me a antidepressant . It did work for a while then I would start up the same symptoms.