I have the oxygenation rates fluctuation, also. I had an auto wreck 2019 and was hospitalized for acute respiratory failure. I had two drs, but neither of them talked to me about what kinds of problems I might encounter, or anything, actually. Since that time, I have had problems and every time I have been in the hospital, I end up on oxygen from severe fluctuations. The last time I had Covid, I was diagnosed in the ER and then started having big dips in my oxygenation rates and was admitted. Once on the floor, I tried to explain to the RN that I had been on the finger reader and had some big dips and probably should be on it again. She was very rude with me, to the point of being hateful, and the second time I mentioned it to her she said FINE and came over and put the reader on my finger. Then she went out to the station and I heard her say my name and everyone laughed. Later I realized that she had put the reader on my finger, but the machine WAS NOT ON, and then went out and made a joke of me. I asked to see her, but waited over an hour and a half, then asked for a Dr and was told it may be late afternoon of evening before I could see a Dr. I told them that I could take care of myself better at home and checked myself out AMA, and received even ruder treatment from all involved after that. I had come by ambulance and no one would even speak to me about finding a ride home. Finally, the guy at the valet parking asked me if I was ok, I told him I didn't know how I was going to get home, and he called an Uber to come get me. Very nice guy! Oh, my experiences with Drs and hospitals are LOVELY! With this Covid [my 3rd bout], I am really having oxygenation rate dips. Comes on for no apparent reason, dips into the low eighties, even the upper seventies once, for a short time and then goes back into the nineties. I have no idea what is going on. My PC said to go the ER.........think I will go back to the Hosp after the experience I had? I don't think so! I am so frustrated.