My husband has been having chest pain,a cold feeling in his chest he often complains that his medicine or food is stuck in his chest also,he is constantly coughing and choking even in his sleep,extreamily bad heartburn,blood in his sputum,not sure exactly where it is coming from,we are in the emergency room rather often,we have been told that the test / blood work is all normal. Any suggestions as to what may be going on.