That is *not* what I would call a long post!! smile smile

I wonder if it might be a simple phobia, of doctors, illness, etc., rather than a full blown 'disorder'. Did she have any very bad experience or even maybe hear about a relative with a terrible health experience in 2nd or 3rd grade? Sounds like she might just be scared. You've probably discussed it, will she just not talk at all about it?
The perfect attendance might be perfectionism in action too...