Stress can increase your HbA1C. Stress increases cortisol levels which increase glucose production and increases insulin resistance. HbA1C is gold standard to diagnose diabetes and reflects average glucose over past 3 months. Your random and fasting sugars appear to be normal but they are not reliable to confirm or exclude diagnosis of diabetes, as they give snap shot of your sugars

Ya stress can increase ur blood sugar. HbA1C is average blood sugar of last 3 months