Hello, I Have A Sprained Left Foot And The Pain

Hello, I have a sprained left foot and the pain is on top of the foot and is strained when I lift the foot or push off the front balls of my feet in order to walk. I'm a restaurant server and work on it today despite the pain. i'm home now and currently icing it and resting then heat. I've been taking pain reliever that is 250mg Acetaminophen, 250mg NSAID and 65mg Caffine. I'm 30years old and wiegh 230 lbs. I work tomorrow at noon for 4 hours. Will I be ready? Is there anything more I can do?