Recurring Dream of Dead Grandparents?

Ok I have had 2 dreams of my dead grandparents. The first dream was about 2 months ago that said stop worrying about everything you are coming home to us soon and everything will be ok... Last night I had another dream, where they said they are painting things and getting it ready for me, and I shouted out load well hurry the hell up then? My wife was awake and she heard me say it, but I just blew it off to her because I didnt want to freak her out... Why do I keep having these dreams?