i think that one can have a variety of sources of headaches. at least it's true for me. i would suggest seeing a good neurologist who could help determine if the cause is migrane and/or TOS and also someone else if nec. who can tell if it's TMJ, tight muscles, trigger points, sublaxation, arthritis... and then a consult w/an ENT to see if you have anything else going on. I just learned that I have one more source for my headaches besides cervical neck and TOS. It's something that I think should've been caught a long time ago as I'd been to many doctors but the ENT I saw that since I never saw an ENT it makes sense. Now I just have to determine in which order to fix the problems. The reason I think it may make sense to see an ENT is due to your dizziness. i'm no medical prof, just a patient like you. and I had an MRI of my brain some years back but noone caught anything--the ENT said that it was because I did not show it to an ENT. geez.