My sister hit me on the era not to hard but now I hear a buzzing noise so I cleaned my ear but I still hear it what should I do?]

Hitting the ear can be serious. You can rupture your eardrum. Call a doctor on Monday if the buzzing hasn't lessened.

Treatment is 'wait and see' so it can heal, but it's important that infection not enter through the membrane, so watch for pus or blood or redness or vomiting or fever, or any other sign that is unusual.