Went to doc feeling tired, down, irritable and unable to lose weight. I have had my thyroid tested 4-5 times over the years at doctors request but was always told levels were fine. So when doc suggested it this time I thought it was pointless but went ahead. Recently rang for the results and was told I could potentially develop hypothyroid and should be retested in 3 months. My TSH levels were 18.4. Should I go back to doctor and ask to be retested sooner or ask for treatment as I don't think I could bare this for another 3 months.