I've been having trouble with my breathing for a while now, and I'm getting worried. I'm 22, female, and I have hypothyroidism. My nose bone is a little big too. For the past year, I've been dealing with this constant heavy feeling in my chest while breathing, congestion in my nose, and chest pain. It even makes me feel a bit dizzy sometimes. Do you have any idea what could be causing this, and what I should do about it?