Your TSH should not fluctuate this much. Sometimes (rarely) you can have a temporary hypothyroidism if you are ill. A high TSH is hypothyroid. Consequences are slow heart rate, muscle cramps, fatigue, slow digestive (constipation) wt gain, poor concentration, increased pain in areas of past injury, brittle hair and nails, dry flaky skin. At 11.32 you may only have slight symptoms or none at all. Also TSH levels do not tell what your body is doing now. They show what your body was doing weeks ago
So, your TSH went from 0.15 to 11.32, correct? Did your doctor do any other thyroid tests?
Besides weight loss, do you have any other thyroid symptoms?