first off,
CALM THE **** DOWN!!!!!!!
now, after you have done that...
if you have a router, you will need to connect to it via webadmin.
http://192.168.1.1/
login if you have a login and go to "application and gaming' or something to that extent. Now, forward the port to your computer's ip (192.168.1.x) and there you just opened a port. if you dont know what a proxy is, chances are you probably aren't using one unless someone else set up your network / internet.