My sleep apnea started all of a sudden about a month ago. The only different thing I had been doing was being sedentary for like a week. I usually exercise a lot, but didn’t do anything at all for a week. Anyways, doesn’t happen everyday. Usually 3-4 days in a row, then okay for next 3-4 days etc. Also I use my pulse oximeter as soon as I wake up, and numbers are usually 70-85, but sometimes even as low as 50-70. I don’t snore, it’s like my mind forgets to breathe completely. I also have bad lungs, never been diagnosed with anything yet though. Do you think I can get possible brain damage from this?