The first attack was about 7 years ago and I thought I was having a stroke and was going to die. It lasted about 5 minutes but those were the longest 5 minutes of my life. Later the same day I a had another attack for approx 3 min. the next did not occur for approx 3 years and lasted only  minute. Again I was pain free for 3 years and had an attack this morning that had me screaming for dear life and rolling on the floor. As always it was located over the right eye but felt like explosions going off. I can not describe the pain in a way someone other than a sufferer would understand. All that I have read says that I should have episodes for a week or two before the remission time but this is not true in my case, thankfully. Is this cluster headache or possibly something else?

Un-medicated, a cluster HA lasts for far longer than that and several times a day.  We do not get one 3 min. HA and then go for several years pain-free.

yeah Leslie, sounds like you got something else. I've only had these damn things for a few years, but I've had to watch my father live w/ them for about 30 years.(not pretty) So basicly my whole family is pretty educated about CH. Don't know why I waited so long to try o2.