Have you been using iodized salt continuously for years? If not, you could be deficient.
Do you get cold easily?
Please read the thyroid basics sticky and check waking and mid-afternoon body temperatures. [98 or below when?]
Thyroid is enlarged, lumpy or asymmetrical?
No testing of thyroid antibodies for auto-immune disease? - which can be caused by lack of selenium which you can find in some multi-vits.
Any DHEA product will do. Low DHEA at your age suggests an issue with adrenals. Lots of stress in your life or major stress events?
Your fT3=3.3 should allow for good body temps, suggesting that rT3 might be blocking fT3 from entering your cells. Stress and starvation diets can increase rT3 - more in the stickies
If you can improve thyroid function via iodine or Rx meds, some other issues may resolve.
Also see advice for new guys sticky.
Hemoglobin a1c suggests insulin resistance which is odd for your 31" waist. Fish oil can improve insulin sensitivity and cell wall permeability.
Low E2 and high SHBG is very odd. Suggests liver issues, however ALT/AST are good.
""" SHBG levels increase with estrogenic states (oral contraceptives), pregnancy, hyperthyroidism, cirrhosis, anorexia nervosa, and certain drugs. Long-term calorie restriction of more than 50 percent increases SHBG, while lowering free and total testosterone and estradiol. """
Starvation diets? That would explain some things.
Test rT3 and thyroid antibodies, if no issue with anti-bodies, then you can try iodine replacement dosing.
Where are you located?