Godaddy Domain Hacked


I registered a domain (.com) 1 year back (it was not old domain it was a fresh domain)
And still it is not expired i have kept it to use in future.
today i just did a google search of my domain and guess what?
there are 1000+ ACTIVE subdomain (of my domain) which are indexed on google


( and the worst part is all the various websites on my subdomain are LIVE
how it is even possible?
i am sure my Godaddy account is hacked!