An HBA1C of 6.4 isn't too bad. In fact, the recommended reading for DM2 is below a 7. You just want to keep it around there. A 6 is ideal - so you are doing great! The concern is micro and macrovascular problems that can happen if you aren't under control....cataracts, glaucoma, kidney disease, neuropathy, heart disease. I'm assuming the preventative medicine your doctor put you on was something that ends in -pril (like lisinopril)? That's very good you are on that - the way it works, it will protect your kidney in a place most diabetics have problems, and will help to prevent it from happening. Like the posting before from the nurse - a good diet is key! And if you aren't sure exactly what you should be eating, ask. Doctors tend to give very generic advice
, so ask if there is a diabetes class they offer that will help, or ask for a referral to a nutritionist...And exercise, if your doctor says you are okay to exercise - is great for control. Even a little bit of weight loss will help tremendously with sugar control. (And quit smoking if you do...or at least start to think about it - your dr can help you when you decide to quit) It sounds like you are well taken care of - but also make sure you are getting a good diabetic foot exam at least once a year...if not 2 times. And the annual eye exam is important! Make sure your blood pressure and cholesterol levels are also okay - it can make management easier as well.
I understand you are worried. It's totally normal to be scared right now, but it sounds like you are on top of it! Keep doing what you are doing - don't skip your medications
, and just keep with the diet and exercise - oh, and of course, your dr appointments! This is extremely manageable, but you have to take charge (and it sounds like you are)!