I think i have been hacked!

Ok....See i was on Aim (aol instant message) just talking to my friends as usual and then all of a sudden a random person starts sending me messages they kept flooding me with their bots till my aim disconnected . Ok, i logged back on then the person stole my sn. Next day i went back on on a different sn similiar somehow the person got my sn and then claimed to be a 1337 . Gave me my ip address and everything now i cannot get on my aim it shows a message saying aim cannot sign on. I also cannot go on my Dsl verizon with MSN it says there is no connection but i can still use Internet explorer just not go on secure websites. What SHOULD I DO?!!??! :'(