If the nurse is limiting you to 2 tests a day, and you aren’t able to buy extra strips, I’d vary the times you test.
Day 1: straight away as you wake up, and just before bed, (nurse likes them readings)
Day 2: before first bite of breakfast, and 2 hours after eating
Day 3: before first bite of lunch, and 2 hours after eating
Day 4: before first bite of evening meal, and 2 hours after eating
It give you an idea of how meals are processed by your body, and gives the nurse the am and pm readings they base things on.