I've always believed that CH was strictly unilateral. My attacks always start with a pain behind my right eye. Pain between the eyes is something I've never heard described and I've been talking to other CH sufferers for 20 years now. I'd accept it if somebody said the pain had spread across the forehead during a bad attack, but for an attack to start in the centre of the forehead is certainly unusual. Hemicranial continua is also meant to be a unilateral pain, but hey, I'm no doctor as they say! I've also suspected this in my case but I've actually had pain free periods during all of the past 7-8 days so it seems unlikely. The only thing is that I'm now using verapamil, which can help HC, so the improvement might be due to that.
Keep us posted, Peggy. I'm really interested to hear how you get on and obviously hope you get some relief very very soon.
Joe