Seeing my passed love ones since I've ben pregnant

So when I'm preggo I have vivid dreams . sooooo clear . the water in my dreams is so clear . the "picture" is clear the movements so my mother passed away last year in November . and I've never had a dream about my mom since she has passed . and even before . but about 2 days ago I saw my mom in my dream ! Smiling and just around me . its crazy I wanna cry as I'm writing this. I didn't think I'd get emotional but . also I see my grandmother slot . she's the one who has raised me. She's around in my dreams and not only her my great grandmother ! I haven't seen her in my dream in years ! It's like I will have these vivid dreams and I can remember them when I wake up but as the hours go by I kind of slightly forget them but they're more memorable than regular dreams I wonder what this means? I'm going to try and pay attention to my dream tonight . anyone have this happen to them ? Or know what this means sorry if this is in the wrong category also