I have episodic cluster headaches. I also smoke. My ch started before I ever smoked. The smoking doesn't trigger my ch but one sip of beer or wine will. I've been goin over in my head day after day what could start mine. I like the bucket theory. Every time my cycle started I was under large amounts of stress for months once the stress was over that's when my cycle would start. I would also have back pain for weeks before cycle. That left me eating Advil at least 3 times a week if not more. I also start work at 4am n get done at 1230 lunch time. In the winter I don't get much sun. I have always napped for 2 hrs at mid day. The different distances of the moon seem to be related also. I noticed once the weather got nicer my ch would end.