I had horrible back pain too! I guess it's gas pains. Brutal! But I walked and walked and walked around my hotel room and took GasX. I think that helped a LOT.
I'd just love to feel the way I did for the two weeks after surgery! For the first time in my life, I wasn't hungry and a small meal felt like I had turkey dinner. Unfortunately that feeling didn't last. I'm back to eating just as much as I did before