I really doubt that your symptoms point to a problem with your wrap. My guess would be that you've got gastritis...inflammation of the stomach and wrap area. You could even have contracted a bug.
Be sure to baby your stomach...nothing that doesn't chew to a smooth consistency (the stomach muscles mash food, and if your stomach is already irritated you won't want to have any harsh, rough foods irritating it further). Eat small, bland meals, and no alcohol or acidic foods.
It will take some time for your stomach to heal, but I suspect once you've gotten past whatever is bothering it, you'll be back in business.
Have you called your doctor? Certainly if you're concerned, that would be a first step. I have a reactive stomach, and my stomach gives me trouble fairly often (even though like you, I was wrapped about 4 years ago (Feb. '09)) I had a reactive stomach before my surgery, and that didn't change.
I can give you one tip. If you have any PPIs handy, take them. The reduced acid will help calm your stomach.
Hope you feel better soon!
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”