The heaviness could be from the anesthesia they gave you and it is having to work its way out. I know it took several weeks to stop feeling it.
I have also eaten to quickly and swallowed air or eaten too big a piece at one time. What I do it "put my hands up in the air like I just don't care " but if I am in a restaurant, then I stand up and walk around for a while. Both help.
I am on a solid diet now, and ate broccoli for the first time today. Did NOT work for me, and I threw up. I ate small bites, chewed very well, but it still happened. I am saying this to let you know that sometimes when you get that feeling - "heaviness" or "tightness" in your chest, that might happen. A "veteran"
bander told me when I start to feel my mouth filling up with Water to get to a bathroom. You may just cough, but you may throw up.