Hello! Thank you for the query. GERD is very often associated with asthma. If your disease lasts long enough it can give shortness of breath, some kind of pain when breathing and dizziness. If you do smoke, this can aggravate the symptoms. Chest pain can be also caused by rib nerves pains due to inflammation; spine disc herniation or by simple muscles pains. Such symptoms can also appear with magnesium deficiency. You should also have upper GI endoscopy performed (if it wasnt recently done) as maybe this is the reason of your chest pains. To see lungs condition chest X-ray (or better CT) and blow test should be performed (so called spirometry). Hope this will help. Regards.