Lack of energy. Should i do plz help me.

I am recovering from alcohol addiction now didn't drink for 2 years. I stop drinking when my stomach got swollen and I had digestive issues then doctor suggest me to take digestive enzymes and acid blocker medicine for 1 year. Now my gastric problems are go away but almost from one year I have lack energy for daily life, my weight is 56 kg. I eat fruits, good diet but I feel no strength in my muscles when I go to gym . Doctor give me multi vitamins and say u gonna be ok but nothing change. I feeling very bad whole day plz help me. My various test results are below- Hb- 14 gm/dl Insulin-2.54 uu/ml after meal Testosterone- 274 ng/dl after meal Blood sugar-68 mg/dl fasting Blood sugar-85 mg/dl random CBC, liver profile, hepatitis b and c are normal. Ultrasound whole abdominal and endoscopy also normal. What should I do plz help me. Thank you very much.