K, it might be due to stomach discomfort that is radiating to your chest
Since u r not mentioning pain there is something related to stomach discomfort, u might have taken outside food which might be spicy and your stomach is feeling discomfort
Next Steps
Kindly take ondansetron 4mg once a day for 3 days, it has no side effects u can take at any time
Health Tips
Eat homemade food , drink lots of water atleast 5 litres per day