What do you say?

My Dad is dying. Days or weeks left. I was told this tonight and I don't know what to do. I have to tell my brother. I have to call my Dad and tell him goodbye over the phone. I can't see him, I can't go to the funeral. I'm stuck. I love my Dad, and I hated seeing him be sick. I knew this would happen eventually but now its here. Now, when I'm 35 weeks pregnant on bed rest. Helpless. Heartbroken. Hurting.
What can I say? When I call him, how do you say goodbye to your Dad? The man who raised me, who taught me, encouraged me, supported me, bragged about me, always told me he was proud of me and that he loved me. I just can't imagine calling him and being able to say anything, but if I don't call him I'll never talk to him again. I won't be be able to call him to tell him he has another grandaughter. I won't be able to call him and tell him when I graduate from college finally. He was so proud of me for getting into college and maintaining a 4.0. while getting my associates degree. He loved coming to my band concerts, music was something we shared a love for. I married a musician just like my Daddy.
I just don't know what to say. I can't process it right now. And yet, everyone is telling me I need to make that phone call.