I got pain at this stage, when I spoke to the dietician, she advised me to eat every four hours otherwise the band tightens and makes it difficult to eat. What I did, I would have a hot drink half hour before eating so that it would make it easier to eat, it worked, maybe try this.
I had an infill last week, again I am finding it hard to eat, I ate two mouthfuls at diner at 7pm, it was too painful to eat, so I gave up, but I am starving now, so now what you are going through. I promise it does get easier, you could have pain under your rids due to where you port is positioned x