It's best to ask your doctor to get their assessment based on your history.
My dad does have occasional chest pain under the breastbone and towards the left shoulder. since his diagnosis. This was relieved with the morphine, and nitro. But what happens with him is not necessarily what's going on with you.
I did read that you might experience reflux with the digestive system problems, and that can feel painful. But I would definitely not mess around with any chest pain and pressure by guessing, and go with your doctor's opinion.