A Lump In My Throat

No really, I have a lump (or the feeling of a lump) in my throat. Its been going on for a while (at least 2 years; maybe more).  My doctor thought it might be a thyroid issue and sent me off for a thyroid ultra sound which thankfully came back negative. However; that didn't answer the question as to what the throat thing was. The feeling would come and go and really didn't bother me (except for being weird) and the doctor didn't seem to think it was a problem. So I kind of forgot about it until recently when it started to be a problem. It would feel more intense and food would actually get stuck in my throat (fortunately not all the time). Eventually; I was able to swallow it but at times the food would re-visit me i.e. throw it up. When this started happening I made a Doctor appointment and stopped eating in public!