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You sound just like my husband, and I read him your post and he has just about all the same symptoms. In fact his ENTIRE family has the same problems. Acid reflux is probably where you want to post your concern. My husband has a lazy flap that makes it hard for him to swallow or burp when he really needs to. I would assume they would have caught that in your upper GI that you had done. All of the shortness of breath is the same as him, especially at night. But mind you he has a very very bad case of sleep apnea. You would probably do well to ask your doctor about getting a sleep study done. He would have never known that he had any sleep apnea if he weren't sleeping with someone. It is awful sounding, he actually gasps for breath and chokes in his sleep. *note you can die from sleep apnea* Even if you don't have the sleep apnea it would do well for you to raise your head with an extra pillow at least 6", with helps with the acid reflux. Good luck, and dont forget to check with your doctor, and the acid reflux boards.