I Have Had Pre-diabetes For Approx 5 Years. I'm 65

I have had pre-diabetes for approx 5 years. I'm 65 and weight 190 lbs, 6 FT tall. I take a daily pill for that condition. I have had numbness in both feet for over 15 years that has moved up my legs within the past year up to my knee caps. It has effected my leg strength. I am very mobile but this condition appears to have effected my balance when walking. I have been to a neurologist and my family DR and both don't seem very concerned. I am ...help