Well, I am glad that you have two options for possible relief at this time.
My insurance denied my trip to the Diamond Headache Clinic...If you write a letter and have a statement from your Primary Care Physician stating the types of treatment you've already had and failure of those and sent that to your insurance company you have a case and it's like SSDI, they almost automatically deny, but keep trying. I got a call from a friend of mine who did that exact thing, point out how much money the insurance company has paid for all the "failed treatments" and they approved her to go to Mayo Clinic....It's worth a try, and if you start now you'll have that option to fall back on, and it'll already be in the works while you are going to have the Botox and nerve blocks.
By the way, you have to keep me posted on all of the above. I can't afford either, but if they worked I'd sell everything I own (Except Tyson of course)
Love you, Hang in there.