I got slapped in my ear last night it was ringing for a while. And now it sounds like I'm in a tunnel help please I don't know what to do or how to treat it

Who slapped you? You need to see an ENT to ensure there is no damage.

You could have suffered some damage to your eardrum. As another answer said, please see an ear-nose-throat doctor. I have very bad ears, due to childhood infections, and wear two hearing aids. I still have infections sometimes, but I have an ENT (ear-nose-throat) doctor, who cleans out my ears every so often. Please see a doctor, as your ears are very, very important. Good luck.