When I was last on a CGM in 2007-08, I was pregnant, so Dexcom kept telling me it was less accurate b/c of being pregnant. So, I went back on it about 3 weeks ago. I'm using Dexcom's new system which definitely has some nice updates (i.e., a warning if your BG is dropping very quickly) and fewer errors. But, I;m still not getting very accurate readings. (e.g., reading 54 when I was 102, reading 248 when I was 178). It seems to go crazy saying I'm very low or high even if I'm not.
So, my question is, are there ways I should be calibrating it better? I saw someone with a medtronic CGM on another site saying she only calibrates when it's close to her meter reading and only when her BG's have been steady for a bit. My trainer just suggested I calibrate before breakfast, before lunch, and before bed. But, also I've been calibrating when the CGM is really off from my meter to try to "fix" it.
Any advice on how you calibrate? I'm testing almost as much on my meter with the CGM which is fine. But, I'm getting frustrated with worrying I'm high or low all the time when I'm not -- I'm having a hard time seeing these 250 and 300 numbers even if I know they're aren't true.