I have been having a constant feeling of a lump in my throat, as well as some minor chest pain associated with it, very infrequently. I have also been losing weight, about 9 lbs in the past 6 months. I have also been having bad upper neck pain. I just recently went for an MRI of my brain and cervical soft tissue spine, as well as an ultrasound of my thryoid, both came back completely normal. I did a bunch of blood tests, thyroid, kidney, etc. which also came back normal. Any idea what this could be?