49 yo active male. have low libido, diff getting an erection, depression, muscle stiffness. but i lift heavy weights, yoga, cardio, etc. total testosterone level 436; free 55.3. should i seek trt? use otc pills? also have anxiety, ocd, bdd?

You described a series of symptoms that may or may not be related to low testosterone, and may be due to behavioral health. Although low testosterone may be a cause (due to advancing age in men), the total level has to be less than 11.1 nmol/L or 320 ng/dL. Testosterone must be drawn in the morning due to how the hormone is released. Also a full lab work-up should rule out alternative diagnoses.