About a year and a half ago I was diagnosed with hypothyroidism, but at that point I was actually on the thin side, verging on underweight. I've been on medication since then and my last two blood tests came back normal, but I'm still having trouble losing weight. I've been eating 1200 calories a day and doing at least 30 minutes of cardio every day. I'm supposed to be losing 2 lb/week, but in the past month I've only lost 4 lb. Could the blood tests be wrong? Or could my thyroid be just barely normal, but still not normal enough for me to lose weight?