I'm sorry you are going through this. I have had extreme migraines, coupled with ocular migraines where I would start seeing colored artifacts or blurry areas for an hour or two.

They have almost disappeared since I switched to sleeping in a really hard Japanese futon and I switched to an active chair at work (search for Peter Opsvik).

It turns out my migraines seem to originate from extreme muscular tension in my left neck-arm joint.

I also suffer from migraines, although not nearly as severe as yours. I strongly recommend you look into kratom for pain management. I generally take a small dose of two grams alongside 200mg ibuprofen and a 10 hour headache will usually disappear within 30-60 minutes. I won't promise that you'll get the same results, but if you're desperate, kratom is relatively benign, cheap, and helps for all kinds of pain.

I would but I don't want to run afoul of any legal issues. Plus I'm on stuff that may interfere. My current regiment is working pretty well.

My latest abortive measure was to apply infrared heat to my trapezius muscle (all the way up to my forehead), tens to the base of the trapezius and back of my neck, and go into the "crocodile" yoga pose for an hour. (I used a very light pillow to make it more comfortable). It took doing all of that over the course of 60-90 minutes and the migraine subsided.

Kratom is still legal. However, it does interfere with many drugs because of the enzyme it inhibits.

I'm sure you have had your share of well meaning advice. But have you checked out PEMF devices? There is evidence that therapeutic pulsed EM helps reduce migraine pain [1], among a lot of other positive effects. The selfhacked.com guy heavily endorses a device called ICES which costs "only" around $400 (but is of course weaker than the heavy duty devices since it runs on a 9V battery).

1: https://www.ncbi.nlm.nih.gov/m/pubmed/11279973/