How To Treat Chest Heaviness And Breathlessness?

Left bundle block, Copd, degenerative heart disease, had stent put in 1 month ago, no real pains but, weak, tired, depressed, someties a pain in my neck, chest feels heavy, hard to breath. So im worried, should i be? VA Baypines for folowups, slow but doing them. Dizzy as well, sleeplesness without atylenol pm s.