Why do I sometimes feel/hear my living father's presence during sleep paralysis?

[Lovely]

I've had sleep paralysis for over a decade. As I got used to it and have grown it became less scary and usually is positive. I usually roll with it and use it to lucid dream. One day while I was getting it I heard a whole bunch of voices and even heard one saying "she can hear us?" followed by several voices trying to get in a word before I entered my dream. The voices weren't distinct but I just knew who they were. Almost all were people who have passed, some I believe we're guides. However I felt one was my dad's. However he is alive, we're still in contact and I see him fairly regularly. I also felt his presence a few nights ago during a sp episode. I never had this happen before and am getting worried it's a bad sign since he does have heart problems and is in his 60s. Should I be worried or is this normal?