How weird!

I get a blood panel done every year; My PCP orders it as a part of my annual physical. The blood panel I get shows all my hormone levels. I don't understand your Dr.'s reluctance to give you that - it seems simple enough to me.

I do understand his reluctance to start to "shooting in the dark", but c'mon.

What about a referral to an allergist? Rashes can be caused by allergies too.

I, took, think you need to be referred to a better PCP, one who does understand the complexity of a concussion.

Have you been referred to a neurologist? I think you need to be referred to a neurologist if you haven't already seen one. A good neuro who understands concussions should be able to help you more than this PCP you just posted about.