Weird internet problems

For some reason I can't load certain webpages like google youtube etc. But sites like mpgh and leagueoflegends and shit like that loads. When i ping google it works but when I try to load the site itself it doesn't. Earlier today I was able to log on aim and skype but webpages wouldn't load. wtf is wrong with my internet.
I'm also able to access any website when I use tor but other than that when I use chrome and firefox only certain pages are responsive.
Also its not just my computer, I tried my ipod and my macbook shit doesn't load on them either.
Connected to wifi on the ipod and macbook.

Wow, try checking ur firewalls? Maybe try em on different computer.