Dear Amy,
Oh, I think you may have
Lupus. Your hair loss, feeling of glass
in your eyes, seizures, plus the symptoms that led to a previous diagnosis of fibromyalgia, this points to Lupus, specifically Systemic Lupus Erythramatosis (not sure of spell) or SLE. Here is a great link that tells you everything you need to know about the disease, altho I'm sure there are many more:
http://www.medicinenet.com/systemic_lupus/article.