One aspect that probably won't be looked into by any medicos that you approach is diet, yet without a balanced and nutritious diet you are bound to become ill.
So you must keep diet in mind.
You may have an allergy or bad reactions to certain things.
Not an easy one to sort out, and you really have to go to a very simple diet and gradually add things back in.
You can get allergy and blood tests that may be helpful.
One thing that I now take every day and which is said to be great help for migraines is a magnesium supplement. I'd certainly be trying that.
Get the powder of liquid.
Lots of info on the web. Google magnesium migraines.