Welcome to the community, brooke10!
First, I'd suggest you to make sure you have Wi-fi on another device or computer, so that you make sure the issue comes from the laptop itself.
Then, I'd recommend you to check Device Manager in Windows and make sure your Network drivers are up-to-date. I'd even suggest you to go to your laptop manufacturer's website and make sure you have the latest Network drivers from there. In case they are already updated, try uninstalling and re-installing them.
http://technet.microsoft.com/en-us/library/cc725782.aspx
Good luck!
SuperSoph_WD