Doubt regarding shugar. Suggest me!

Showing fasting shugar  instantly today  94 and whenever I check it will show in fasting pp normal or slightly above in blood check thoughrouhly. 3 months average always shows pre diabetic level. Reports telling vericose veins and ulcer. Not curing since June. Real problem starts while wearing shoes for 2 days while going out of station in February. Not curing due to diabetic neuropathy leaded as ulcer conclusion by vericose veins specialist. Now toe right side puss formed due to small injury as well as right side leg also injured with cheppal hitting while sitting back side in vehicle. Palm leg is blackish. Doctor given antibiotics and suggested small operation for Toe and for total cure he is feeling to start INSULIN. Is it necessary insulin for me since my shugar levels less.? Using medicine one tablet daily for shugar since 2009 please suggest me Regards Venkatesh