Its so great to have an answer! MAT I'm truly jealous. Not to steal your post but a PET/CT found old calcified nodes which my neuro and a pulmonolgist said were highly suspicious for old sarcoidosis. Im wondering if that was the trigger for all of my nasty cranial and nerve stuff I have going on. Best of luck, prayers answered, now you can forge on with peace of mind. And I am just the opposite of you - low c3 and c4 complements!
L