I had just one episode with cluster headaches but for the first few weeks they considered it just migraine.
It was about 14 years ago and I was at work in the cargo area of Manchester International Airport. It was during a night shift and soon after my lunch break I started to see what I can only describe as "a string of lights" in my left eye, I didn't think much about it until about 10 minutes later I was on a forklift approaching a wooden pallet and suddenly the left side of the pallet vanished from my view, I looked down at my hand holding the wheel and I could see the hand, the top part of my arm but all the central area was not visible without me swiveling my head around to see it out of my right eye.
Once this happened then the pain came, I lived about 20 miles away and knew I was in no fit state to drive until about 2-3 hours later. I went to the doctors that morning and the first idea was maybe it's my eyes so off I went to get checked out and nothing. Then it was "it's a migraine", two weeks later after getting these headaches almost daily I went back and it was a different doctor, this one asked lots of questions and after awhile diagnosed the "cluster headaches". I can't remember what meds I took but after a short period of a few weeks it stopped being a daily occurence, then a little later it finally stopped.
I suppose I was lucky because since then I haven't had any problems. Maybe getting older, not so much physical work and getting way out of condition does have its advantages !!
You have my sympathy if your still getting these attacks, mine was a total period of around 2 months of agony and that isn't an understatement.