On Monday instead of a 2 mile timed run, try running intervals, or wind sprints. Sprint 100 yds, then slow jog back around to your starting point, then sprint again. As many as you can.
10 out of 10 fat people are fat because they live a fat lifestyle. Fat doesn't just appear out of thin air. Regardless of any kind of medical condition, people get fat because they eat more calories than they burn off. Period. A person may have a condition that may make losing weight hard, but...