There are so many potential causes of foot pain that we are just guessing here. But shoes being too narrow has caused problems for me in the past, even if they didn't feel too narrow. I had one pair a few years ago that caused a lot of pain on the balls of my feet after a couple of hours riding and that turned out to be just a simple width issue. They were just slightly squeezing the sides of my forefoot and after a few hours it led to the classic hot-foot sensation, followed eventually by very painful foot cramps. Stopping and removing the shoes at that point gave instant relief, so I knew it was the shoe. I moved to a wider fitting pair and the pain never returned.