The other day I was having a good day with all my numbers between 4 and 6 (mmol/L or between 72 and 108 mg/dl), that is until diner. I was at 5.5 (99) before my meal, did normal insulin for a normal meal that I've had before. I left to head out and finish some studying at school about an hour later, on my walk to school I decided to test my blood just because I was curious but felt absolutely fine. My meter read 1.9 (3.4)! I was absolutely panicked and immediately took 4 tablets of dex4. I finished walking to school and tested 15 minutes later and was at 15 (or 270). This was about an hour after my injection of humalog, none of it adds up. I never have spikes like that, my monthly average is 6 (108) and my control is pretty good.
I know that my meter has a bit of trouble when it's really really cold out but it is still extremely worrying. The way I spiked up its almost as if I didn't need the dex4 and my meter was wrong. To jump 13 mmol/L in 15 minutes while my humalog is peaking for just 16g of sugar just doesn't make sense.
If anyone has any ideas or similar experiences, let me know!