First of all, the "pain in my head constantly" may be what we refer to as a "shadow." Clusters are referred to as the Beast. Makes sense, huh?
As to your other point, I have to remind myself at bedtime that if I wake up and wonder am I having a cluster attack, I am, and I should get right on the oxygen. The abort is easier. There are some documents on this website under patient resources about how to make the most of your oxygen experience (doesn't that sound romantic!).
Also, Four cycles in nine years is, as you point out, lucky. I used to be episodic, one episode a year for 6-12 weeks with headaches only every other night (sleep and alcohol are my triggers). Slowly over 41 years my cluster disease has progressed, and now I'm chronic with 3+ attacks every night year round.
Lots of resources here, glad you found us. We are, I think for the most part, people for whom the medical world has not really made a place (although thanks to Clusterbusters and others that's getting better), and we are each our own guinea pig, experimenting to find remedies and prevention that work.
All the best!