How do I find out if I have an inheritance hanging in limbo

My grandparents passed away and I’m their only grandchild. My grandma was killed in 2004 and my grandpa passed in 2006 I know they had a living trust but recently I went down to public records and found a copy of my grandma’s will but it only names representatives and not beneficiaries or names to inherited. There’s a lot of money involved as well as business and farm stocks etc. I asked my mom and she said grandchildren don’t inherit but it’s only my uncle my mom and myself are all the family. I don’t see my grandmother leaving me nothing. I’ve been told by a coupe people that my grandma left me a lot but my mom says the people telling me this are messing with me, I’m not the type of person someone messes with. I’m trying to find out if I inherited from my grandma or grandparents. I was in prison when they both passed away, so I was not around but I know my grandma or grandpa wouldn’t disown me