Tony, I am so sorry to hear of your Dad's illness. I too lost mine Christmas Eve of 08, he had health issues, but it was sudden and unexpected. I hadn't seen my family since 02, but I did call frequently. I spoke with him 3 days before his death and it was one of the best conversations I ever had with him. My significant other has been chronically ill for quite a while now-10 years or so, and it is not an easy row to hoe for either party.
I pray for a quick outcome of good health and vigor. Peace be with you and your family