It is possible to still get reflux after a Nissen...just less. If the surgeon created a wrap tight enough to keep reflux to zero, you wouldn't be able to get food past it when you eat.
The holidays are a time when we overeat, and can get some reflux. If you've got sensitive lungs, you'll get breathing problems as a result. While the Nissen keeps most of the acid in your stomach where it belongs, even our wrapped friends can get some reflux when trigger foods are eaten.
I had horrible lung issues with minimal reflux before my surgery. My lungs improved 100% once they healed post-op. Still, I have to be careful, as a little reflux can create havoc. My surgery was done 5 years ago, and my lungs are doing great.
I suspect you'll find that your wrap is intact. Eat very carefully for a while. You could even take some Zantac or PPI for a while until things calm down. I would bet that with some time and care, you'll get feeling good again soon.
Hang in there!
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.”