I do get scared, Bon. But my oximeter is my friend when I'm really freaking out. I sit for a few minutes, breathing evenly, before I attach it to my finger to get a reading. It has never indicated that I'm in a "danger" zone. It helps me plant my feet back in the present and know that anxiety and fear are nipping at my heels. My NJH doctor said that dropping below 90 is cause for concern...not panic...but time to see a doctor. Since they've given you O2, it probably means just what they say - you've not acclimated to the high altitude. Try (as best you can) to relax into it. The extra O2 will make you feel better. It doesn't mean it's a permanent thing. .