Unusually high electric usage/bill

I just noticed my last month's bill was over 3 times more than it normally is and usages is also way over 3 times normal. Has anyone else had experience like this before? I couldn't find a number to call to talk to an actual person about it, so I just sent an e-mail for now. I live in an apartment, should I talk to my landlord about it? There is no way I accidentally, unknowingly used 3 times more electricity in one month than I ever have in the past year living here.

Here is what the graph looks like http://i.imgur.com/ybzTxqv.png

update: it was a misreading and is being corrected. Thanks for the help guys.