I have been reading this site for quite awhile but had nothing to bring to the table other than my head hurts, too. I have been a cyclic sufferer for about 15 years until within the past few months, I've become chronic with 2-5 clusters per day, all of which were accompanied with extreme pain and suffering. I have no insurance so I thought I was screwed.
About a month ago, I tried melatonin (brand: Spring Valley, dosage: 2x 5mg nightly). It didn't help immediately but after just less than a week, the results began to show.
Since that time, I have not had a full-blown cluster. I still get occasional – sometimes daily – shadows, but my quality of life has greatly increased. The shadows are manageable by the conventional methods— cold air, caffeine, deep breaths, etc. I'm telling you, it's remarkable. I can sleep, think and do anything else that I need to.
It makes me a little groggy in the morning but it's a small price to pay.
Hope it helps someone. Let me know.

Glad you jumped on the board pain. There are a couple of people on the board who have posted their only med is melatonin. So glad its working for you, hoping it continues.

JOe