how long ago you had eaten or had some calorie-containing beverages, your general feeling of health/well-being, stress
levels, fatigue, any other symptoms etc. Since you have
blood test supplies available, this data collection may not be overly taxing.
Then, give you doctor a call to discuss the results. If you're not pleased with the interaction with your doc (or any doc), ask for a second opinion. Even in folks without diabetes, there can be noticeable fluctuations in blood sugar.