Have you had a physical workup and blood tests? Could be thyroid or other hormones or things going on. Did you start or end other meds or anything? I had a heck of a time this past summer when I had nerve problems and my doctor was trying various meds and my asthma was acting up too and I started a new med. It was hard to tell what wasn't "right" when I started throwing up. I thought it was the new med but it was probably a combination of some of the others.

Haunted, look at this? http://www.thyroid-info.com/articles...depression.htm