Just as another data point, my ex-girlfriend also had debilitating cluster headaches. Psilocybin, not microdosing just tripping on it, would make it stop for a couple of months.
Also, you might be familiar that taking pure oxygen during an attack in known to stop the attack. The problem is that it builds a tolerance were you need more and more which brings problems of its own.
Also, you might be familiar that taking pure oxygen during an attack in known to stop the attack. The problem is that it builds a tolerance were you need more and more which brings problems of its own.