I suspect your symptoms do reflect to gastroesophageal reflux?
Did you research on Acidic Reflex?
Sarai, you say that the lump is in your esophagus, and I'm wondering when you are scheduled for that barium swallow? That lump could be caused by several different things....acid reflux that can lead to (or may be already present) erosive esophagitis, Barrett's esophagus, an infection source even though you were given an antibiotic (perhaps it wasn't sensitive to the type of "bug" you have or the duration wasn't long enough to help), it could also be (depending on where you are feeling it most) a build up of material that hasn't washed down your throat . With the last thing in mind, are you able to "hack" it up? Was your thyroid gland palpated by the MD to check to see if you have a goiter or a nodular thyroid gland? The reason I ask this is because typically with any type of painless lump that you can feel in your throat, and not necessarily within your esophagus, it's cause by an enlarged thyroid gland?