Thank you for your advice. I will follow-up with my doctor. On a related note, is it common to also have almost constant mucous with asthma? I clear my throat several times a day and have a few big hacks to bring up mucous. I've been on Advair for 2 years but it hasn't decreased my mucous production at all. It's not clear but solid yellow (always has been) so maybe I have a constant mild infection?
Thanks again
Asthma is mostly associated with tightness of the chest, difficulty taking a truly deep breath, shortness of breath and sometimes, discomfort of the chest verging on pain. A burning sensation would be most uncommon on the basis of asthma, alone. Burning can be a symptom of coronary artery disease, but were that the case, it would be most unusual for you to climb 5 flights of stairs several times a day without precipitating the burning. The most likely cause would be acid reflux. You note that you are taking omeprazole presumably, regularly, twice a day, but nevertheless, your problem could be reflux. You should discuss this possibility with your doctor. Use of a 24 hour esophageal pH probe is a common way to assess for reflux and you would probably want to have it done while on the omeprazole, if you are still experiencing the burning while on that medicine.
The other is that you are experiencing referred pain, referred from or originating in an organ below the diaphragm and most commonly this would be the pain of gall bladder disease. Finally, from your description, the burning could be due to inflammation or compression of the intercostal nerves or from branches of a bundle of nerves, called the brachial plexus.
Good luck.