re: Anyone here experience Cluster Headaches?

I had them for several years - knock wood. The best thing I found to relieve one was Relpax. No otc drugs would touch it. Episodes stopped when I went on a cpap for apnea. Not sure if that was the reason or coincidence but Doc seemed to think it helped.
Odd thing was they started reoccurring after my second Covid vax. Lasted about two months then stopped again. Strange, right ?
Sumatriptan would usually kill one but took longer than the Relpax. That drug used to be super pricy (about $100 each) and most insurance wouldn’t cover it. Much cheaper now so might try that. Usually knock one out in about 15 minutes. Oxygen didn’t help me at all but can’t hurt to try.