Burning sensation under feet. Strength.

Hello Doctors, I have been a diabetic since the last 7 years and have been under various medications but now since the last 5 months my sugar levels have been under regular control but the other problem now I am facing is burning sensation at the bottom of my feet and also pricking pain in my private parts. I did check if I had uti but that also came clear but the pain continues to trouble me especially in the night. I have also lost a lot of weight resulting in weak muscles. I don't have the strength even to lift a bucket of water. I am looking to gain weight and build my strength and muscles back where it was. I am currently 72 kgs but used to be much more healthier and strong. Can you please recommend something for the pricking pain, burning sensation in my feet and also to improve my health in regaining body strength. Thanks!