I’ve had cluster headaches for over 30 years. I finally greatly reduced my headaches by going to a chiropractor to move a disc back into place that subluxates at C1/C2, which was great since I only had attacks a few times a month instead of 2-3 per day. Now, I’m suddenly getting more attacks. I’m off Sumatriptan cause it doesn’t work now, I’m using Rizatriptan but am not finding it effective and fear that I’m bringing on more headaches. I’m on Verapamil daily but it’s not working. No, oxygen doesn’t work for me. I’d be grateful for any other suggestions, this is getting rough.