Ive Been Having Problems With My Chest. It Comes On

Ive been having problems with my chest. It comes on quick and suddenly usually when im on my way home from work or on my days off. It starts out with my chest hurting. Like someone sitting on it. Then my arm starts to hurt the left one. Then it gets hard to breathe and i keep yawning. Ive been to the e.r twice for it now and the first time they said nothing the last time they said my muscles in my ribs were inflamed that it was making it hard to breathe. Told me to take advil for the swelling. It started about 6 months ago and now continuously getting worse and worse. I do not eat spicy food too often and usually doesnt happen after it.