This isn't the right forum, however you need to immediately change your information. I would suggest changing your password here on Xbox.com also if you have a friend you trust have them recover your gamertag (BUT ONLY IF YOU TRUST THEM!).
Once the profile is recovered to a new Xbox they will not be able to log into it.
BUT! I think you need to definitely call into Xbox Customer Support and let them know that your profile is in jeopardy. The number is 1-800-469-9269 (1-800-4MY-XBOX) and you need to let them know what happened. Also make sure to file a police report and
if the person who stole your console logs onto your profile at all, it should be possible to trace by the IP Address they access from.
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