The lump feeling could be because of the reflux or acidity or heart burn.
Take care of reflux, It is one of the reason for recurrent throat irritation
,, it doesnot matter you feel heart burn acidity or not.
Take--- Antacids and antireflux medicines .
Keep head end of bed elevated.
Avoid alcohol, Smoking
Do brisk walking daily
Go for walk after dinner
Avoid spicy food
Avoid late night coffee