Feeling bad for you, but I know the pain of it all. Had my identity stolen twice. Wasn't fun to fix but I did it myself, took time, fingerprints, signing and notarizing of documents, copies of my Driver License, Passport, birth certificate, etc. Start with calling the credit card company, save all the paperwork about the 'new' account if you have any. Usually the card company will start an investigation and ask you for proof that it wasn't your card.
AND look around for 'friends' who might have had access to your identification stuff. I had a friend stay at my house, she let her male friend stay (I was out of town), and HE stole some of my checks. Got that one sorted out too after I threatened to call the cops on both of them. You never know what people will do when given an opportunity. Sad stuff.
WARNING! This person is extremely blonde...please type SLOWLY.