Hello
You ate pop corn, soda, burrito and on the same day in the night ( after 6 -8 hours of these food items ) there was excruciating pain the chest and also radiating in the back .
The reason of such pain is Hyper acidity or
gastritis as it causes burning sensation in the
esophagus ( call as
esophagitis ) that's why pain referred in the back.
Take some antacid ( better if it contains oxetacaine ) but if symptoms are severe ( pain and nausea or vomiting ) you may need drugs like
proton pump inhibitors like pantoprazole+
domperidone , once or twice as required .
Avoid alcohol, drinks with caffeine in them , spicy , greasy , oily foods .
Also avoid pizza, burger , hot dogs ( acid producing substance ) sweets as all these items , if taken in large quantity produces hyper acidity .hence all these symptoms which you are having.
Hope this will help you.