Infected cut in my mouth?

A few days ago I had apparently bitten a huge chunk of my inner cheek. I didn't notice until it started to swell and hurt. I have tried just leaving it alone, but each time I even slightly move my teeth it gets irritated and swells more. I've swished salt water, but it doesn't seem to help. Are there any other home remedies out there? (I'm also a broke college student without a lot of supplies in my apartment.) Anyone looking to troll here are not welcome, I'm just looking for simple answers.