OMG! I had never heard of a cluster headache. I looked up a few websites after I read the posts here, and I think this is what I get! I couldn't believe it.
I have had several fruitless trips to the dentist over the last couple of years because of absolutely excruciating facial pain and headache which I put down to dental problems, but to be told my teeth are fine.
It has happened about every six months for the last 3 years. I am fine one minute, then banging my head on my desk (literally) and grinding my teeth a few minutes later because of the pain, which goes from the right side of my jaw up to my head, with two main points of facial pain in my upper jaw and behind my eye going into my head as though I am being stabbed in the brain and face simultaneously, with tears coming from my right eye. It usually lasts for about an hour or so, then goes quickly. This then comes and goes over a period of a few weeks, several times a day, then mysteriously goes away for months. And yes, sleeping is impossible. Sitting still is impossible. Is this the sort of thing you mean? I can sympathise.
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Time is an illusion. Lunchtime doubly so.
Epona of The Laughing Hyenas