How do I get back in my Android?

So last night i changed my numerical pin on my LG Optimus S. I saved my changes and it was about an hour and I wanted to listen to Pandora so I tried my pin and it wouldn't let me through. Then, I thought maybe the forgot Pattern would show up but after many failed attempts I was left with a phone that could only receive calls and texts. PLEASE HELP ME!!!!!!!!! I have to make a call at 4:00 PM