I have heard that Brain on fire has been going through some rough times lately, involving surgeries, PT, and a challenging recovery. This community has meant a lot to BOF, and BOF has provided a lot in return.
Best wishes from me, BOF. Get well soon and rejoin us when you can.
I do notice my cluster side nostril is much more sensitive then the non cluster side to the point that if I rub my nose sometimes it can trigger an attack. Try moving from the nasal cannula to a mask that covers your nose and mouth. A non rebreather type mask works best for most eliminating the outside air from mixing with your fresh oxygen.