you will need to see your medical provider or better yet an ent specialist -- someone that his the expertise and tools to directly visualize your throat to see (and hopefully) retrieve this piece of foil if it is there. sometimes it just "feels" like we have a foreign body when we do not. an neck x-ray should also reveal a metallic foreign object.
swallowed small piece of aluminum foil a few days ago still stuck in throat. what can i do?