So yesterday my AHI was the highest I'd seen so far (but still low, just 4.2) and most of 'em were CAs. I wasn't worried about most of them, because they had that arousal look, but then there was a "run" that looked "real". Not that many, and not that long, but I keep waking with headaches, feeling like I could REALLY use a nap during the mid to late afternoon (I do my best not to take one, but if I find myself sitting quietly, I zonk out) and generally feeling "blah."
To get more data, I ordered a CMS50D+ and got it yesterday. The best news is that I'm not desat'ing much at all, nor that low (just to 80%) and only for a very few seconds. The "bad" news is that I only saw desats that low after my run of CA's this morning.

I don't think this is anything to worry about at all, really, but I will bring it up to my Neuro when I see her, because CPAP doesn't really do anything about that, does it?
Also, I'm beginning to think I have "health anxiety" -- but honestly when does it cross the line? My GP thought I was overreacting when I asked her to check my thyroid for what she felt was just a "sore throat" (I told her it was my NECK that hurt when swallowed, though) and it turns out my T4 is high and I likely have thyroiditis (see the endo tomorrow). They felt I was "overly sensitive" when I went in complaining of lower right abdominal pain, because people my age don't get appendicitis -- and I didn't have that, I have diverticulitis on the right (even more rare).
All in all -- I've been more right when something pinged my "this isn't right!" radar than I've been wrong, so it's difficult for me to chill and trust that the dr's are going to do that right tests, etc.
EDITED:
That should have read HAD diverticulitis, I have a diveritculum.