I lost my iPhone 4s!?!?

I had it on Friday. (January 27, 2012.) I brought it to my grandma’s house that night but I was listening to music in the car on the way home. I remember setting it down on one of the tables, but I couldn’t find it in the morning. I have tried to track it on my iPod, but I logged out of icloud on my phone. My room is a mess. Do you think I will find it if I clean it? Do you think it is in my house? Thanks!