My husband has had severe chest pains causing him to double over and very loud belching which continues for 1/2 hour at a time or longer. Gets it when lifting things, getting hungry, getting stressed. Doctors have done xrays, endoscopy , sonogram, heart is in good shape. Can t find answers Doctors put him on meds for possible gerd that caused shortness of breath so he stopped taking meds after 6 weeks. He uses over the counter Gas Relief and takes them many times a day. It s terrible to watch someone in such pain. Any new ideas?