This picture after a heavy late-night meal usually points to acid reflux - the acid irritates the throat and gives cough, a tight feeling in the chest and disturbed sleep, and headache follows from poor sleep. Keep dinner light and at least two hours before lying down, avoid curd, eggs and fried food at night, and raise the head end of your bed a little.
Next Steps
If the breathlessness increases, chest pain starts, or you get vomiting or black stools, get checked the same day; otherwise if it does not settle in 3-4 days, book a Practo teleconsult with me or visit me at Synergy Multispeciality Hospital, Miraj.