I don't know if your symptoms include vomiting or not. Mine have, and now my mother has had the unfortunate experience.
I have known 2 people whose migraines put them out of commission for days at a time. Literally into bed in total misery.
If you do a Google on Extreme Headaches & Extreme Vomiting you will find the Rare Diseases Data Base. I would try there for some new treatment options. They are happy to mail out their reports (free of charge).
In my instance, I used the microwaveable heat packs --and I packed them on the sensitive spots on my head. This gave me rather immediate and continued relief. I have about worn out the microwave and my poor flax seed and rice filled heat pad.
Your brain is mostly lipids (fats) and it does not especially like heat, but in the case of the headache, I decided the risk outweighed the use of the hot packs. Like you, I agree, that migraines are more like torture than an illness.
You might want to check into acupuncture. Find someone who is very competent.
Beware the Adze!
Beware the land it came from.
... ... ...
That chisel of metal ~bi3 n pt~
With which he opened the mouths of the gods.