I'm just about 3 months out and have little to no energy..

Are you reaching your protein, fluids & vitamin reqs everyday?

Being weak all the time can come for several issues such as lack of protein, not enough vitamins.

Without sufficient protein, your body will scavenge protein from other areas of your body, such as your muscles. Protein is extremely important after surgery as its job in the body is to build and maintain tissues including your body's major organs and skeletal muscles. Protein deficiency, when continued over a long period of time can cause a disease known as protein caloric malnutrition. Common symptoms are poor healing, fatigue, hair loss and muscle wasting. Immediate post op, protein promotes healing of the staple line and incisions.

Vitamin B12 is also very important in helping form red blood cells and for maintenance of the central nervous system. B12 is also required for synthesis of DNA in the body. A deficiency could cause pernicious anemia, causing mood swings, paranoia, irritability, confusion, dementia, hallucinations, or mania, eventually appetite loss, dizziness, weakness, shortness of breath, heart palpitations, diarrhea and tingling sensations in the extremities.

It might also be related to any medication that you are taking. The absorption rate of some medicines will be altered by the surgery.