Thank you all so much. After posting, and engaging with you all, it was amazing how much better I felt - even though I thought I was in for a really tough path in the coming weeks. The great news is, I have not had one since (I have had some VERY light versions of behind the eye pain/discomfort - but negligible). With that said, I am not drinking any alcohol whatsoever. I am prioritizing my sleep, D3, Melatonin. From what I have been reading the part of the brain that regulates sleep and seasonal (moon) cycles is very much involved. I have recently been perscribed and been taking propranolol, which had messed with my sleep cycles. I do believe taking the copious amount of mushrooms and whiskey (the night I had described) has played a part. Once I did that - and I was a moderate to heavy drinker - alcohol (whiskey in particular) became disgusting to me. I was shocked. I even said at the time - something in my brain changed. I called it 'walking through a door' with the help of the mushrooms no doubt, where I did not want to drink alcohol at all, it was poison to me. That feeling towards alcohol has eased a bit over the past 7 months since that happened. However, I had not drank much, and not straight whiskey since then, and - BAM headache hit me hard that night I did. I do believe it was a cluster headache. It had all the symptoms listed. It was very scary. The pain was not a 10 (the most painful experience a human can feel)... but I was in shock as well, so not sure how properly I could rate the excruitating pain I was feeling. I do have a history of concussions (3-4 in my life) and smoked cigarettes as a young man 20-22 years old, again 26-29 years old. Thank you for being here for me, very humbling and feel for you all as well. Nick