Hi Oz!!!
My sister suffered for months from Migraines. They did all kinds of tests on her, but to no avail, they all failed. She got injections in the side of her head of botox, but they are very expensive, and a temporary relief. Come to find out, after she had an MRI, she had a couple of brain tumors, one in the back near the stem, and the other behind her sinuses. They took them out successfully and she could again return to work. Well, they started to come back, not as bad, but none the less, they were problematic. She had
a very bad anaphylactic reaction to some new insulin she was taking and had to be rushed to the e.r. Once she was off that new human insulin, she got better and better!!! She
is allergic to human insulin. While this isn't addressing your problem, it is still what happened to my sister. Do you
think it's organic somehow? Like you had a mini stroke?
I didn't know they would, or could cause migraine?
They don't really know what migraine is, or where it comes from, and that makes it hard to treat. Topamax didn't help my sister , either.
Ask the dr. what they think happened to leave you with such unbearable head pain. You might discuss having a bran scan as well. If it is caused by having had a TIA.....what can
he do for you???? Do you take insulin, or blood pressure meds? Sometimes beta-blockers can cause the blood vessels to constrict....also blood thinners.

Good luck. I hope you find the answers you are looking for!!