Personally, I think you should wait unless you have new experiences or information to add to your application that could influence your spot on the waitlist. If you are waitlisted, you won't hear from them unless they're offering you admission off of the waitlist, or to let you know their class is full and therefore your application is no longer in consideration. I know it's harsh, but that was my experience the first time I applied to grad school. Best of luck to you though!! This process is not easy.