I have sleep apnea but was told it is minor
It is a scary experience to be on oxygen I know because I am on it and I think that is part of why I am experiencing sleep apnea. So I do understand how you felt waking up to the reality of being on oxygen seeing them tubes not sure of what was happening that would make anyone fear the worst. I hope things has gotten better for and that you have found a way to manage your sleep apnea.
I did a home sleep test back in 2021 and was told it was “minor” as well. Which I second guessed it because I knew I had issues back then. It only got worse overtime. I was at a severe level and my oxygen actually dropped to 86 in the hospital after I had my back surgery end of May this year. It was scary, I woke up to all these oxygen things on me and oxygen in my nose. It was definitely a wake up call.