Esophageal spasms are possible. The first one I had lasted a few hours and was pretty excruciating. My surgeon prescribed nitrous, which is usually for heart patients. I resisted the urge to take them and just dealt with the pain. These spams I believe mimic a heart attack and can be very alarming. But, they just would pass for me. I didn't notice anything that triggered it.
Right after my surgery, I had a lot of shoulder pain due to trapped gas, but this went away quickly and I've seen none of that since.
Take care. :)