The messages you have been getting aren't possession sounding like as the above may suggest above, in my line of life it is common for people that are open truely, more seen in children (not saying it doesn't continue most play it out to imagination and it should be kept quiet). Your grandmother sounds like a lovely person to come give you the blessing of strength for future.
Don't be too alarmed buddy, there are 8 year olds out there that remember themselves being shot down in ww2 and can pinpoint there place of landing. That to me would be a bit more eerie, granted I haven't had as much comunication as you, I usually get a person peering in around a corner or something.
My honest advice is just listen to what they ask, they sounds of it they are hoping you have the best life possible, to keep your base morals with you and do the same for your family. They are wholehearted things you should be doing anyway personally. Greet them, ask them why they are here, hear them out and if it isn't pleasant ask it to leave as it is not welcome in you or your family's home. Find your base meanings and understandings from them, much like a dream can tell you a lot about your emotions and your current path in life.
Feel free to pm if you have further questions or just want to chat, you sound like it's pretty wound up with no one to talk to about I know the feeling it can swamp you if you aren't ready that's not just in your case but any topic/s on this forum can cause that.
Edited by chopmo, 16 February 2013 - 03:51 AM.