I suspect it could be something to do with the gallbladder surgery from last year, so I've copied and pasted this from a site:
LIFE AFTER GALLBLADDER SURGERY
Abdominal pain, nausea, gas, bloating, and diarrhea are common following surgery. Postcholecystectomy syndrome (after gallbladder removal syndrome) may include all of the above symptoms plus indigestion, nausea, vomiting and constant pain in the upper right abdomen. Sound familiar? You're right -- gallbladder attack symptoms. Up to 40% of people who undergo gallbladder surgery will experience these symptoms for months or years after surgery.
here's the link
http://www.gallbladderattack.com/gallbladdersurgery.shtml