Let me begin by saying that your parents are fortunate to have you looking after them. In spite of their own worry, I believe that your love, concern, and prayers are a source of strength for them. I experienced a difficult health crisis before my transplant, and knowing that my sons were 'there' for both me and my husband, their dad, was a blessing and a source of peace and comfort for us each day of our ordeal.
I am sorry to learn about this new complication for your dad. It is difficult to face uncertainty, and we learned that it helped us to deal with one day at a time as we prayed and hoped for whatever was our future.

Christmas was a tough time here. We cut back of the festivities and decorations. Our boys took care of dinner and it was a wonderful family time for us. Don't be surprised if your dad wants to stay home and have a relaxed Christmas this year.
Peace and Strength

@formydad I will be hoping and praying for the best for your father. First, I hope his pain will improve, that can cloud everything I think. Then I hope the prognosis will improve also. You sound like such a loving son, your parents are very fortunate to have you there for them. I know my son and daughter would be the same if they lived closer but they live states away.
As @rosemarya said, they may want to stay put this year, it might be easier for them, but with you and your sisters able to help out and do most of the work then it will hopefully be a happy holiday, merry Christmas, for all. When my son and daughter come home for Christmas they pretty much do everything, even now. That started when I was pre-transplant (liver).
Unfortunately, there is nothing that can be done for your sad feelings, they are just natural for a caring person. I am sure as your father improves, your sadness will too. I hope each day improves for your dad.
JK

@formydad I’m very sorry to hear about the ‘not good news’ for your dad. But, having you near is so comforting to him and your mother. Take each day as it comes. Be upbeat and positive when you can. You’ve been so strong and caring for them all this time. Maybe the American Cancer Society has a support group that you could go to. Would that help you to deal with stress?

@formydad You are such a strong person, and I for one am so glad you found us, to share your concerns with and let us offer support even if it is just electronically. If I was there with you, I would first give you a long hug, then sit down with a cup of coffee or tea, and let you share as you do here so wonderfully. It has to be somewhat disheartening, as you've watched your dad take steps backwards then forward again. As @becsbuddy suggested, contact the American Cancer Society, or a Wellness Community, to get some in-person support if you feel called to do so. Quiet holidays can be so much more meaningful, and recalled clearer, at least for me. It's okay to be sad, you are having normal emotions. How are you doing this morning? We are all here for you....
Ginger