So sorry to hear about your loss. My mom passed away the morning of the 18th just two days earlier than your dad. I wasn't there and I kind of wish I had been. It was so early in the morning and she was sleeping peacefully when she went with no pain thanks to hospice. It is really hard to lose a parent. I also lost my dad 3 years ago to a sudden heart attack. It is a weird feeling. I do not have any grandparents left or parents and I am only 35.
Hang in there and God bless!
Jdale