I'm sorry you're going through this but also relate to what you wrote. As someone else said, be prepared to possibly feel shock and in my case, some weird guilt. I can't explain it but I don't think it's uncommon. Guilt about feeling some of the feelings you feel now, guilt about sound decisions, heartbreak that surprises you. I think it's all normal IF you feel these things. Everyone is different and you may just feel overwhelming peace. Wanting someone to have a peaceful passing comes from a place of love, but sometimes has lingering affects after it happens. Try to give yourself space to feel everything and know that you provided comfort and love. I hope you and your family have some beautiful moments with your father in the last days.