There is a strong possibility of viral infection or an allergy which resulting in pain. Thing is that when you get in contact with the allergens you feeling this pain. I would suggest please avoid foods containing vitamin c as it triggers viruses' action. I would suggest you to take the second option and consult with an experienced ENT to get a complete diagnosis.
Hm. That is an odd response from a doctor. I've never had one minimize my issues like that. I would try a new doctor. There is something called Globus Sensation. It is that lump feeling in throat such as you describe. https://www.medicalnewstoday.com/articles/320245.php Lots of different things can cause that. Things like pharyngitis, tonsillitis, even gerd. But stress can as well. Are you sure this wasn't what the doctor was referring to? Stress and Anxiety are on the lists of causes to this sensation. in which case, theory would go if you treat the anxiety, that should get better. But regardless, I think you need to talk to another doctor who will give you more time and work with you to help you recover.