Your fasting blood sugar of 80-90 mg/dL is within the normal range, and a 2-hour post-meal level of 145-180 mg/dL can be slightly high but does not always confirm diabetes by itself. It is best to check tests like HbA1c or fasting and post-meal blood sugar regularly and review them with your doctor. Maintaining a healthy diet, regular physical activity, weight control, and limiting sugary or high-carbohydrate foods can help keep your blood sugar stable. Since you have other medical conditions and are taking other medicines, it is important to discuss your results with your doctor for proper evaluation and guidance.