I am not yet diagnosed, but I get it with different type sensations i.e.
right rib discomfort, sharp
right rib pain, sharp right chest pain, and also the sensation where I cannot get my breath, like something sitting on my rib cage.
Also when I am walking for exercise sometimes I get to the point where I cannot catch my breath. Sometimes also after going to bed at night, I will notice that I cannot breathe in and out with a full inspiration/expiration.