tough to say.......i dont know how the cycle will affect you. If your feet are always numb, it could also be diabetic neuropathy, which is where the nerves in your feet start to get damaged. But this is usually long term. For circulatory problems, you could try taking some aspirin, which you should always be on anyway due to your risk factors. It will improve your circulation somewhat. There are other meds too which your doctor could tell you about.
If your leg workout was so hard and this all of a sudden started, then you could have a compressive neuropathy or you just happened to start getting diabetic neuropathy now, at the same time. It kind of depends on where the numbness is if it is only one side or both sides. Too complicated to deal with here. Sorry i cant be more specific, but i dont have you in front of me.
As for your HgbA1c, the upper limit is 6.5 so being around 6 isnt necessarily ideal.
Im off to the gym.
T