Dream about a black cat?

i lost my grandpa a few years ago..and ive missed him..so the other night i asked that if there is a sprit world and if he is around me..if he cud come to me in a dream that night...he did not..but a few days later i had a dream that my friend sara...(who actually is pregnant) was pregnant in my dream.and i put my hand on her belly and her baby pushed its hand against mine...but the weird part of my dream..is i walked into a room..and there was a black cat..that was about the size of a dog...and it was stareing at me....it walked up to me and stood up on its back legs and put its front paws on my chest...and just stared into my eyes....for a really really long time...if anyone cud tell me what this dream means..it wud be nice...