How often do you test?

The hardest thing to deal with is the diet.m I was already vegan before the diagnosis, now trying to add enough protein in each meal,is hard. I take 1000 mg os metformin a day and really focus hard on the carb counts. My worst time of the day so far is the afternoon. I get so sleepy and my sugar is higher then. I teach high school and being sleepy is not an option. I am a runner and have been for a couple years so as far as exercise goes I don’t know that I can exercise anymore unless i ride a stationary bike for like six hours a day. Then imwillmhave to eat a bunch more food.