Presentations and Prom

I have a HUGE final presentation tomorrow. Basically my whole graduation is riding on it. So naturally I've been having mini break downs ALL DAY. And it really doesn't help that I feel like a giant lump of ugly in my prom dress. I really hate feeling like shit about myself, but it seems to me that no matter how many times I pull myself up again I still feel the same way about myself. Fat, zitty, weird, ugly girl. I need some relief. Desperately.