Doc,
I'm also very sorry for your loss. Things happen in God's time.......not ours and I know that you were as prepared for the inevitable as a person could possibly be.
Your Dad is now at peace.....and he knows of the love that you have shown by being there for him on a daily basis. Words cannot express the loss that I know that you feel, so I won't even attempt to try to ease the pain.
He is now up above.........his work here is done he can now look down proudly on his son below and know that he did his job well as a father. He is a proud person and even a prouder parent. May God rest his soul. My Grandmother passed away back in 1983, the day after Christmas after a long battle with cancer.
I still go to her and my Grandfathers grave on a regular basis and have "chats" with them. They listen and put my mind at ease as to my senseless worries.
God Speed..........and "his" will has been done.
If you ever need to talk......you know how to get hold of me. As you said, grieving is a process.........take as long as you need and I will keep YOU, most especially in my daily prayers.
Winterhawk1960