I am having a lot of trouble breathing and have a heavy chest, could my hiatal hernia have got worse today. I was doing some work and couldn't breath?

Emergency room . Please go immediately to the er. When a 56 year old man has chest heaviness and breathing difficulty, it's an emergency until proven otherwise. Go now.
Short of breath. Hiatal hernia is in general not a cause of shortness of breath unless it becomes very large and replaces lung space. You should go to er and get seen to be sure you aren't having an acute cardiac event.