persistent sore throat,pain when swallowing,difficulty
swallowing or frequent choking
on food,bad breath,lumps in the neck,persistent ear
pain (called referred
pain; the source of the pain is not the ear) and change in voice quality.
ref:http://findarticles.com/p/articles/mi_gGEC/is_0012/ai_2699001237/pg_2
Keeping in mind your history of acid reflux in all probability this has to do with GERD.
Your symptoms also occur only with certain food substances which also favors a diagnosis of GERD.