Stephanie,
I am so, so very sorry to hear of your Dad's passing. You did everything you possibly could to help him, and I am confident he died knowing how very much you love him.
As far as peace or shock, it is probably both. It sounds like you are well aware of the many positives that came from you donating to your Dad, including a new peace between your parents. You also more than likely are in shock - this is not the ending anyone wants or envisions. We all know it can happen, but we all go in to this hoping and praying, and usually believing it will not actually happen to us. You have been through so much in such a short time. You had to go through the decision to donate, then the surgery and now the loss of your Dad. That is a lot for a person to go through.
Please continue to reach out to your friends and family for support. You are a strong person and will get through this. Please know your friends on the donor board are here for you as well. Keep us updated how you are doing. I am keeping you and your entire family in my thoughts and prayers.
Hugs and more hugs to you.
Linda