Hello I understand your concern. You have not mentioned your age. Foreign sensation in throat,gastric reflux and loss of appetite may indicate oesophageal or peptic ulcer with or without H.pylori infection /some mass or malignancy in chest or neck area. If I were your treating doctor,I recommend, -Go on with endoscopy and CT chest with consultation from gastroenterologist. -PPIs like omeprazole once in morning for 1 month duration help decrease reflux. If H.Pylori found,antibiotics are generally given with omez under prescription. -Avoid hot,spicy ,high fat content food.Avoid alcohol and caffeine which may exaggerate the situation. -Keep a gap of atleast 3 hours between meals and bed time.Sleep with head elevation. -Multivitamin supplementation and small frequent meals because of loss of appetite. Further specific management depends upon results of investigations. Hope this information helps. Thanks.