I would suggest that you make an appt with your pcp to get checked out. There are lots of things, including thyroid conditions, that can cause fatigue. Be aware that they have recently lowered the "normal" range for TSH, so if you were borderline before, you might be considered hypo now. I tested high-normal for years before I became hypo, and I feel 100% better since I started taking meds.
You may also be at point where you have to exercise to lose weight. In my experience, even before banding, if I eat 1200-1400 cal/day, don't exercise and don't drink enough Water, I won't lose any weight, and I might even gain a few lbs. I think that FitDay really overestimates the calories burned for basal metabolism.
Good Luck!
Melissa