I've been keeping track of my blood oxygen levels ever since I had COVID about six weeks ago. Lately, I've noticed that after climbing stairs, my oxygen levels sometimes drop to around 93-94 for a bit, and it takes about a minute to go back up to 96-97. I'm a bit concerned because I never really checked these numbers before having COVID. Should I be worried about this change in my oxygen levels, or is this just a normal recovery process? When I'm walking or doing the 6-minute test, my oxygen levels are fine at around 96-97, and theyre good when I'm sitting too, around 97-98. Does this sound alright to you?