Hi, I have recently had an episode of heart arrythmia (probably atrial fibrillation), and I also suffer from a number of other symptoms associated with thyroid disorders. The only one that is problematic is erectile dysfunction, but I also have cold hands and feet; very thin eyebrows, especially in the outer third; and a whole list of other such signs & symptoms, including a tendency to tiredness and low mood. My thyroid blood test results fall within the normal range: FT4 (13.5 pmol/L), FT3 (4.11 pmol/L), TSH (2.02 uIU/mL). However, I have read somewhere that mainstream medicine sometimes overestimates the "normal" ranges in these respects. Is it conceivable that I have a thyroid problem? Or is there definitely some other explanation for the erectile dysfunction, heart arrythmia etc? Thank you for any advice!