Two things just hit me so I wanted to post them in case they might be able to help....

1.) Have you been tested or dx with stomach ulcers? as they can have this type of affect on the body
2.) Have you been tested or dx for any tubal infection - as they too will cause a person to be in pain, not want to eat and loose (or gain) weight no matter what they eat.

I ask because I went through both of these mdecial problems over twenty years ago.