You are having a foreign body sensation feeling.
First of all if you have not consumed any non vegetarian diet ie a bone piece then do not worry.
If yes then go to the hospital and get x ray
If not taken then you can have carbonated beverage like pepsi or coke once and then take antacid
syrp tablet and antireflux medicines.
it could be because of reflux and so you have the foreign body sensation . the reflux is more in night while we sleep. as the muscles are get lax and so the reflux occurs