So I as of June I was weighing between 215-220. I have since lost weight down to 188.7 as of this morning, and am having a very hard time figuring out why. I was tested for hyperthyroidism by my doctor, but my levels were normal. I eat 4500-5500 calories a day, high protein, high carb. I don't really do cardio at all, squat and deadlift twice a week, and don't do any illicit drugs, I also rarely drink. Anyone have any idea what's happening?