Hi, I decided to buy a glucose monitoring device and am a bit confused because it gives a reading that seems to be in a different format to what I've read about. Like it gave 5.2 yesterday and what I'm used to is a number like 90. I found a site that gave what I think might be a guide to both readings like 90-130mg/dl (5-7.2mmol/l), but only on a few examples. I'm a bit concerned because this morning before eating my reading came out as 3.1 which seems very low, I didn't feel too well, but I always feel terible in the mornings. I think in the manual it said it could flash up the words hi or low so maybe it wasn't low enough to be a problem. I also took it this afternoon when I felt unwell again and it came back as 3.1 again. i had just been for walk. The two other times I tried it the results came back as 5.2 and 7. As you can tell I'm new to this so any advice would be great.

Many thanks, Vicki x