Wow, sorry to hear about this migraine. From what I understand, migraines are known to occur more frequently in people with autoimmune illnesses, which I think all of yours are, that you mentioned. I can't explain it. I read an interesting theory on migraines from an autoimmune perspective, but can't remember the details at the moment. But it made perfect sense, whatever it was! However, I do know that muscle tension in the upper back and neck, can trigger a migraine.
I don't mean to belittle your pain. I know it's horrible, as I have chronic pain myself, and the rare migraine. I don't visit this board as often as the ones I moderate, but like to drop by once in a while.
There are quite a few medications for migraines. Have you thought of calling your family Dr and asking to try an other med? Tell him the one he gave you didn't work. What med did he give you, by the way, if you don't mind saying?
Do you see a pain managment specialist, or have you ever thought of consulting one? I don't know a lot about your other illnesses, but I'm pretty sure a pain specialist would have treatments that might help a little more with the pain. If you want to think about consulting a pain management specialist, you might check out a message that I maintain on the chronic pain board called, "How to Find a Good Dr". It's just a bunch of things that work for me, when trying to find a Dr, plus links to some websites that have physician-locating features.
I'm not sure I can even suggest any "home remedies" for a migraine. But have you ever found anything that helped in the past? Maybe someone else will reply who knows more than I. But meanwhile, just wanted to let you know someone cares, and I hope you're feeling better really soon.