Earlier on, I noticed I was feeling a little panicky, perhaps a little light-headed also (something wasn't quite right). I decided to check my pulse with an oximeter built into my phone, which displays my SpO2 level, but I normally just use it to monitor my HR.
Anyway, I was shocked when I saw that my oxygen sats were at 82%, the lowest I've ever seen it (it normally reads in the high 90's, and often 100%). So this got me immediately revved up. I checked every minute or two to check on it, and it was all over the place. Between the initial 82% I recorded at 15:27 today, there were readings ranging from 90% two minutes later, then up to 97% in the same minute, then two minutes later it plummeted once more to 84%, then back up to 99% a minute later. Three minutes after that, it once again went down to 92%, then back up to 97% at 15:4, only to dramatically plummet 8 minutes later to 79%. This was the lowest reading I recorded, and my heart wasn't racing as such, ranging from 59bpm when I first noticed the low reading, to about 100 (although my HR did spike to 128 when I was in full-blown panic mode). Throughout this time, my only symptoms were panic and slight light-headedness, but I was in a state of high anxiety prior to the first reading.
What could have likely caused this very weird fluctuation of values? Could the reader itself have been giving a false recording, or was I going through some kind of respiratory breakdown? Anyone had any similar experiences?