What you're describing sounds totally normal. As Barry said, your wrap area is very swollen at this point. In fact, the area becomes increasingly swollen over the first two weeks or so, and then the swelling gradually decrease as healing progresses.
Glad you've joined the forum!
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.”