Last night I was using the wireless connection at my university just fine. Then, I left the lounge where I was working, went back to my dorm room,and tried to connect again...and couldn't. I went to sleep, figuring it would work the next morning. It doesn't. I can connect to the ethernet in my room, so it's not a huge deal, but at home I only have a wireless connection.

details:
I am on a large college network
I can still connect via ethernet cable
I can see that there are at least 4 wireless networks I should be able to connect to.
I tried rebooting my computer

(also I am not the most tech-savvy person out there.)