Hi cwc000, if i remember right you have prediabetes which is said to cause
prominently small nerve damage, which of course is showing up as numbness in your feet.
When you say you can feel the cars pedals, then one would think that not all of your small fibres in your feet are completely numb as they must be still sending signals to your brain to interpret that feeling.
Prediabetes can also affect the larger nerves as well, which is not mentioned in some studies i have read, its usually picked up by an EMG which was the case in my PN, your balance problem makes me think that there is some large nerve involvement going on as well, which could explain the balance trouble, have you had an EMG yet ?