I got slapped in my left ear and right after I went to pop my ear and air blew out I had to swim and when I got in the pool my ear hurt so baad my hearing is a little more quiet in the ear I got hit on what do I do to fix it

You can Google "broken ear drum" and you will find a world of information. Here's one of the better ones (IMHO).

Eardrum Perforation: Middle and Inner Ear Disorders: Merck Manual Home Edition