Weight Gain After Emergency Colon Block Surgery (Eroded Lap Band)

Nov 1 had redo of breast implants. Nov 3 had tummy tuck. Nov 15 had emerg surg for intestinal and colon blockage. My lapband from 2006 had eroded into my intestines. I lost 25# after surgery and have now regained it back plus some. I'm eating very good and two weeks ago started an exercise program. I've had infection from my incision since the surgery and there is still drainage - I also have hot flashes - could I be running a low grade infection that would be contributing to weight gain?