Hi andromeda,

It is bad, I know, that you are suffering so prolonged with unrelenting headache.
Have you tried Mark's'cocktail' of meds? I think he takes up to 1000 mg. Tylenol (acetaminophen in US; = paracetemol in UK); plus somtimes up to 1000 mg. aspirin ... Mark: Do I recall all that correctly? I've forgotten in which thread was your posting.

At any rate, I wanted to offer a traditional German Bad (spa) hydrotherapy for self-treatment of migraine, headache, and insomnia.

Hopefully you have a bathtub. Fill it with very cold water, as high as you can. You can densely stuff tissue around the overspill 'flowvent' if you've not a deep tub.

Unlike here subtropical where our cold water is never less than 60+ some degrees --- hopefully you there can fill tub with nearly icy cold water.

Dress warmly your head, upper body, abdomen, and thighs. Bare your legs from the knees.
And then you "tread" the cold water in the bathtub ... like "marching", lifting your feet high and stepping down.
Do the treading, marching, walking, swishing through the cold water in your tub --- try for 2-3 mins at first, 5 mins at second treading. Increase as you can, 10-15-20 mins as needed, as tolerated.

I used it during grad school lifetime for migraine and insomnia, with success. Unfortunately it doesn't work for me subtropical DownHere where rarely can we get a 'run' of actually cold water out of any tap or faucet.

Thinking of you, Lady Andromeda, and hoping for relief for you very soon.

Theta