RJ, I'm not sure what you mean by "burning lungs," but if you are experiencing burning type chest pain, that could be acid reflux--which, consequently, is also a side effect of corticosteroids. I understand they can be very hard on your GI tract. You might want to try taking Zantac OTC and see if that helps a bit. If it helps, it probably was acid reflux.
hmmmn, I had lung issues on methotrexate, but I can't remember if I did when on prednisone....good luck, definitely talk to doctor asap about it.
That doesn't sound very good. If you think your symptom is related to your heart, you really should call your doctor and/or visit an urgent care clinic.
Another thing to consider is that sometimes breakthrough acid occurs despite the PPIs. I've taken a double dose of aciphex for years now, but I usually have to supplement with Zantac OTC because the PPIs aren't perfect (gosh, they're good, though, aren't they?).