my daughter Ashley (age 16) had similar issues starting 3+ years ago. She was finally diagnosed with Gastroparesis a year ago. Check out

http://www.g-pact.org

for more information. Also, you can read my daughter's story at:

http://www.caringbridge.org/visit/AshleyJenkins

Also there is an excellent you tube video created by a young lady with Gastroparesis to raise awareness about this rare disease. You can check it out at-