Hi Mkipp,
You’ve been given some good advice here, and Lalucia has specifically said it well. You say your parents are ‘Congregationlists’. Well, they continue to embrace the Christian faith, -that’s a wonderful thing. They could be doing a lot worse. Personally (in my gut feeling) I think that many Protestants (over some Catholics) will have a better room in God’s mansion. There is usually a bigger story involved when Catholics leave to a Prostestant religion. Read 838 in the Catechism.
As for the timing of your father’s death, -my Dad’s situation is similar. Many of the men in his family died in their 40s. My Dad is living (in his own home) at 87. BTW, he and my Mom (with him still), left the Church 45 years ago over a misunderstanding with a priest. They do not attend any Church. But who are the couple that are always helping their neighbours, never saying no to anyone. They are poor, on very little pension, but they put themselves last. I tend to think that God is at least smiling when they do good works (which is from their hearts).
And finally, we do not know when anyone of us will leave this world. First of all, remember that we are on this earth with the main purpose of ‘leaving it’. We spend a very short time here to then go on to our ‘real’ eternal life. Try to focus your thoughts on simply enjoying your father every day. You are so blessed already to have a Dad that you can talk to every day. And pray. Everyday, pray. And leave the rest in God’s hands. I believe that that’s what He wants you to do, He’s in charge, Trust Him. My prayers are with you.