I had those symptoms turned out to be stomach cancer you need this checked out by a gastroenterologist if caught early you can beat it I did

You need to see a doc about this. It's not normal and you need to find out what the issue is. Many people with COPD have started eating four to six very small meals rather than two or three large ones. The diaphragm expands with COPD and begins to push down on the stomach, limiting what can be held and digested, but your problem sounds a lot more serious than that.

Thank you both for your answers I have a Dr, next week

My stomach gets hard as a rock too.. I have told several doctors, none of them ever respond , its like they dont even feel it or listen to me...sometimes they agree with me , but thats it

Thanks