I'm working with my insurance at the moment to get them to pay for the O2 with the proper mask and flow rates etc.
As I said before, I don't have a Vit D3 deficiency.
I realize that D3 has been shown to provide some measurable improvement to 80% of CH victims and that some even show nearly complete improvement. 80% is a lot, but it is not 100%. I am part of the 20%. I'm also part of the ~5% that have both CH and migraines and the ~15% that have side shift sometimes. Though the gross majority of my attacks/clusters/months are on the right side, every once in a while it will switch to the left for a bit.
Like most CH sufferers, I have tried a lot of treatments. Here is a short-list:
Melatonin - Works somewhat at shortening attachs and cutting down their number, but I sleep for 18 hours and my migraine symptoms come back with a vengeance making it impossible to function for work purposes. I pretty much have to be down 24 hours a day.
Triptans - Help with the migraine symptoms but increase the length, pain and shadows of the CH attack. Not worth it. Injection does not abort the attack.
D3 - Does nothing for me (yes even in very high doses)
Opioids - They only help if I can take enough to be effectively unconscious of the pain (drooling) and I need to take them long before an attack, which takes some guess work, and they can give me rebound symptoms, addiction. Pretty much not an awesome choice.
It is also possible that one might try some things outside the prescriptive process. But those aren't necessarily legal so I'll forgo that discussion in a public forum.
Also, as I said before, I am psychologically exhausted and am seeking a support network outside my worn-down family. Once I'm feeling up to it, I'd also like to provide the same to others. Now, this conversation has exhausted me further. Respectfully, I am not on this discussion board for unsolicited and aggressively persistent help with treatment options. I researched all of this in minute detail long before feeling comfortable enough to post my issues to a group board. I expect that most people do the same.
My personality is such that I aggressively seek out treatment options and am often quite aggressive with my doctors. I've pissed off more than a few. I keep a copy of my own medical records and am adept at reading them.
I apologize for my direct approach in this response, yet my previous attempt at a lighthearted redirection did not seem to communicate my intent effectively.
In lighthearted response to some of your posts, while I was once a lifeguard for a few years when I was younger, I am no longer one. My middle son (Alex, 13) is a Junior Lifeguard, though I doubt that his VitD transfers to me. I also worked for years as an IT architect (think The Matrix). My wife (Michelle, I'll say

25) and I (both prior novelists) own a small publishing company, where we publish mostly fiction (novels, children's stories, etc.).
When I am not working, I like to spend time outdoors. I am a hobby metalworker and woodworker. We do a lot of walking, hiking, jogging, bike riding, swimming, playing at the park with Eli (3) and many other activities.
I have a pretty awesome life besides the monster chasing me.
Thanks for the support! I'm just so tired of dumping so much on my family yet I can't go-it-alone.