My physical symptoms have become stronger recently and I do wonder sometimes if there isn't anything wrong with me, physically, that could cause the (worsening of) symptoms of anxiety.

So I know that low testosterone could cause anxiety, so maybe I should get tested for that. Thyroid hormones could do so as well, so that should also be on the list. What else? Cortisol levels? Vitamin levels? Other things that could be checked via blood / urine / saliva to rule stuff out?