How can I help my husband with his daily migrains?

My husband has daily severe migraines. He is 35 yrs old, was in a bad car accident as a teenager and has been having migraines since. On a rare occasion he will go a few days without a headache, or the headache will be brief. The past week has been horrible for him. He is getting severe migrains several times a day accompanied by severe gas and vomiting and dizziness. Meds he takes are Topomax, Cymbalta when he can get samples from his doctor ( insurance wont pay for it), Imitrex ( insurance only pays for 9 pills a month which just doesnt cut it, they are usually gone in less than a week), Zomig if he can get samples, or Axert if he can get samples, phenegren as needed, Excedrin if he doesnt have anything RX to treat the headache. His primary doctor doesnt seem to take him seriously. His cat scans come back normal. His neurologist will not listen, he only preaches and tells him what he will do instead of asking questions and listening. Our insurance only will pay for one neurologist in our area ( the crappy one he has) so he cant change neuro docs. They have been severe enough in the last week to completly disable him, he hasnt been able to work. He cries and shrieks from the pain, bangs his head on things because he says it feels better than the pain. He vomits and has horrible gas. He is very careful about what he eats..no chemicals or spices or processed food, mostly natural food. Tommorow Im going to try to see if I can take him to maybe an urgent care center or somewhere where they can run some tests on him..Im wondering if a spinal tap would reveal anything? What kind of tests are important in headache evaluation? The only test he has had are cat ( CT) scans. He cannot take vicoden or percocet or anything narcotic because it makes him even more naseous and doesnt help much with the pain. Demeral injections or IV helps, but as soon as it wears off he's back in the same boat. Cant run to the doc or ER everytime he has a headache for a Demeral shot, either. I dont know what to do, he cant work and gets very little relief. It's tearing our family apart, Im not in the best of health either, I have a bad case of crohn's disease and just had another major operation on my bowels..so I cant work now either. HELP!!!

I dont know what to do, please help!