See if you had swallowed some soft thing it might have dissolved and sometimes it happens that you feel it has entered in your respiratory tract
but it is in your food pipe only,If it was in respiratory tract then you might feel difficulty in breathing and suffocation also.If something is stuck up in food pipe even when the thing is in the stomach then also the sensation of something in throat remains as you feel in case of eye the sensation of something in eye remain long after removal of foreign body from eye.
Anyways take plenty of water and if this symptom still persists after 24-48 hrs or if it is not improving and you face some problem like suffocation then consult ent and then gastroenterologist immediately .They may look up by endoscopy
and check out for any foreign body and remove it by special instruments.
Hope this helps and removes all your doubts,