I have exactly the same symptom as you. I was having upper esophagus ulcer three month ago and did two times of Endoscopy and the doctor said the ulcer is healed. But I still feel something in my throat. Sometimes I feel chest pain as well. Sometimes I feel a hair in my throat and sometimes I feel a lump in my throat. I have been seeing GI and ENT doctors and they could not find anything in my throat. Before the esophagus I didn't have reflux and the doctor said the ulcer was not caused by ulcer. But now I feel I have reflux. I don't know if this throat problem is caused by reflux. One GI doctor told me that if the lower part of esophagus has problem the feeling would be in the throat. I don't know if the reflux demanged the lower esophagus. Let me know what your doctor find out for you.
Hope you feel better!