Hmmm Have you checked for Viruses? Most likely its not just Internet or you havn't connected propely. Sometimes its the Web Provider (Mines Xtra [www.xtra.co.nz] They provide my internet connection) When they go down sometimes I can only go to the sites I have recently visited.
Dudes you have a conection problem. It happened to me one time. It may be the server. Wait a little.. Tomorrow your computer may be fine. If not call someone to help you because you mahy have a virus.