Yeah, i do believe in dreams.. and also consider patterns of messages from different things around you. Like Ghosts, Satan and of course God. I also believe that not every dream has a meaning. but some do have.. most of the times, you see dreams just because something revolving in your mind.. or you have some stomach problem.. I expect that, where you grand father told your mother to do some medicine was actually those dreams which never had any meaning, but some stomach problem
That is just my assumption..