I am glad you have the opportunity to obtain a second opinion at Chapel Hill!
Wouldn't it be wonderful if they could find something truly helpful?

I imagine they will be loking for "structural" abnormalities?
Will they be looking at any "functional" abnormalities?

Do you have any "autoimmune" types of illnesses?
Do autoimmune illneses run in your family at all?
The reason I am asking this is because some auto-antibodies have been found to be causing some chronic migraines. (These are found it specific blood tests.) Do you know if you have ever been tested for these antibodies before?

These are often referred to as antiphospholipid antibodies. They are now known to be much more prevalent that previously thought.

Further information about these specific antibodies and testing guidelines are available at: www.apsfa.org.
(Both Tina and Heidi are the founders of apsfa.org and own the site. They also do a great job in operating the association. They have done an amazing job! They are open to helping with any questions. There is a mountain of highly organized information there! A tremendous site. Many thanks to Tina and Heidi for their dedication.)

So glad you have joined in with us here at NT! Hope to hear much more from you! Take care!