Esophageal sphincter?

I have unusual noises in my throat and upper abdomen. Seems like the noise of the lid shutting on a rubbish bin. Its when I swallow(throat sound) and also when I cough(upper ab) I am due to have a barium swallow xray then possibly the endoscopy but I am so frightened of what they might find. I am not losing weight and I dont really have anything that sticks but sometimes get a bit of chest pain and heart burn during the night and sometimes during the day. I am taking pariet and previously nexium as I also have bronchiectasis. I rasied my bed and also eat small meals and chew slowly so is there something serious going on?