I had an experience similar to this, but in my case I knew I was asleep, but the event was real, as though I was not asleep. It wasnt a dream, and I've never had anything like it happen to me since. My mom spoke to me and told me she was ok and that she missed me and that she loved me. I am 100% sure that it was her.

I had a friend that reported something similar. She said she felt someone sit on her bed and it was her mom speaking to her. She said that her mom told her the same thing... that she was fine and not to worry about her.

I believe it was your dad and that he was reassuring you. <3