I had RNY on August 30, 2005, and had complications from the start, including a gastrogastric fistula. After seven endoscopies in one year, four years of constant pain, every ulcer medication known to man, I still have TWO fistulae and ulcers. I am having revision surgery on January 18, and I am hoping and praying for an end to this.
Many small fistulae resolve on their own, or with medication. The problem, as you noted, is when it does not, you don't have a functioning pouch anymore, because everything you eat empties into the old stomach and you don't feel full until you've eaten a full meal. I feel hungry all the time, too, but didn't for about 16 months after the original surgery.
You have my sympathy - I finally have insurance to cover the revision and a surgery date. Good luck.
Starting weight/doctor's goal weight/current weight