Thank you for your diagnosis; the iron deal has cleared up a few things, though as my doctor just called me yesterday and told me he was referring me back to the GP, so he apparently wasn't too worried (ahem: knowledgeable) about the transferrin. I'll find another GI doc, I guess.
Funny; I was thinking yesterday of adding the cortisol test, but I didn't. I haven't had any such test, yet, but I will.
Really, thank you again.
Please don't use the word diagnosis here. Neither I nor other members here are in the business of diagnosing as we are not licensed doctors. All I did was share knowledge commonly available from lab testing websites like LabCorp and Quest.