I received an email saying that "Somebody requested a new password for your Facebook account" but I didn't request to reset my password. What should I do?

NOthng.  Someone tried to hack your account.  But they didn't get through.  You can try reporting it.  But how?  To WHO?  And what proof do you have?  If you have any, report it.

RUN AWAY! RUN AWAY!!!!

Change your password yourself.

There is nothing else you can do