HBA1C by HPLC method is the gold standard to diagnose
diabetes or prediabetes. It is average of your glucose levels in last 3 months. Your levels are within the normal range. RBS tends to fluctuate based on diet, exercise, stress etc. It is not used to diagnose diabetes. Based on your levels, you have nothing to worry about.
Next Steps
Obtain
HBA1C every 6 months with fasting glucose and insulin levels