I would rule out the regular diet. If you were able to swallow what you were eating, and things weren't getting stuck, I wouldn't think that would do anything. I also went on regular food (things that could be chewed to a liquid) on Day 5 or 6, and things are intact.
Bill's question would also be mine. Sometimes great surgeons who have not had lots and lots of experience with Nissens can create an issue that in time leads to the need for a redo. You might want to consider a second opinion as you move toward surgery.
Good luck! We'll be here o lend support!