My thoughts go out to you. It has been many years since that one fateful year I lost both parents-- three months apart-- but it still seems at times, like yesterday.
Unexpected loss has to be the worst. Of course you are hurting. You will get lots of DUers who will envelope you in their thoughts and prayers and who want nothing more than to comfort you. While we all may be at a loss for what to say, please feel free to talk about your father and your loss if that helps. We are here for you.