Hello Tina,
I'll just leave the links to a couple of forums here for you below.

Reflex Sympathetic Dystrophy (RSD and CRPS) Forum

Fibromyalgia and Chronic Fatigue Forum

There is a button at the top of the threads on each forum that says
"Search this forum". You can use that if you want to find past posts using a particular keyword - e.g. you could search RSD forum for "orthostatic hypotension" or "tachycardia".

I'm sure you'll find information and support here to help your daughter.
take care.