Everything shifted over to the left. What did I do?

[Sue, Murphy and Bella ()*o*()]

Hi, for some reason my layout on all the pages has all shifted over to the left. nothing is centered and my tabs that were on the top are now on the left side as well. How do I get it centered again? Have no idea what I did to mess it up/
Any help?: Thanks

[Joanne ~ Spud*]

Alrighty then! On my way to work on this now. Will be back in a week! LOL