Sorry, guise - that mystery sore throat and mouth pain does seem to have been the precursor to my Lichen Planus acting up, and although it's not a common symptom (about 5% get it), I do get intermittent fatigue and brain-fogging when I get the blisters in my mouth. As I try to be a little clever with the posts, brain-fog is not good for them. I'm mostly okay, just dumb and tired.

My apologies.