Maintaining 200 lbs weight even at 1100 kcal/day is still unlikely. That should produce a slow weight loss. Due to natural daily fluctuations it may take several weeks to see a significant change on the scale.
Have you had a resting metabolic rate test? They can tell how many calories you burn based on exhaled gases. I weigh about the same as you and burn about 1700 kcal/day just sitting on the couch.