Gorgeous view again. Sounds like it could be that your body sees this as a stressed at the mo. The good thing is that you are aware of it.
Some type 2s try to see off a liver dump by eating before hand (your mileage may vary as the say). They try different types of snacks - some use a carb snack, others use a handful of nuts. Then they test like you do to check the effects.
How long did it take to drop back down?