Cruciform, I feel your pain and then some. I am still undiagnosed with something. I have been given over 25 medication over the past year (most of which I haven't taken) I have had 12 CT scans, 5 EEG's and 1 MRI.
Diagnosis depends on doctor.
I have more testing this week to try to get to the root of the problem. They think I may have brain dammage from boxing. No sh*t! I coulda told them that.