Lump in my Throat. With recommendations.

Male. 25. 6,2". Average Build. Every time I swallow, there's a very noticeable feeling of a lump of some kind in my throat, it's hard to pinpoint exactly where it is but I'd say just behind where my Adams apple is. This first became noticeable in January after a really heavy night drinking, I didn't think anything of it until it started to cause me discomfort and stress. I saw my GP about it and he said he can't see or feel anything, prescribed me a numbing mouthwash for some reason and that was that. Last month, I had noticed that it had gone away more or less but there was still an odd feeling of what felt mucus build up in my throat despite not having a cold. And this week, that lump feeling is back again. I'm really getting stressed over this cause it's causing discomfort all day every day, it's also starting to effect my singing (I'm a vocalist in a band) so that's adding to my stress further. I would really appreciate any help or responses at all with recommendations.