HI, thanks for using healthcare magic
There is lightly mild trauma to the esophagus
which resulted from the large portion of food. It is true,as you suggested , that cigarette smoking
would irritate the esophagus along with other structures.
This inflammation should resolve on its own after a few days. It would be best to use soft , non spicy or acidic foods till then.
Anti inflammatory pain killers such as ibuprofen
may help with the pain.
I hope this helps