Welcome to HCM,
Your reading of HbA1c
7.4 is high which indicate you had hyperglycemia
in past few months.This result tells us that you are diabetic but if you have doubt about diagnosis of Diabetes
then you can recheck Fasting blood sugar and Postprandial blood sugar level without taking any drug for a week.
Once it is confirmed to have diabetes then diet control and regular exercise and medicines if required are to be taken regularly.
You can do so with consultation of your treating Physician.
Your blood sugar is coming low so it is possible that you can control with diabetic diet and exercise and proper FBS, PPBS monitoring every month.Please also check your Lipid Profile
Please get HbA1c every 3 months.
Please take care