What can I do if my mother took my settlement money from when I was a minot

I was in a car accident in 2011 when I was 9 years old with my parents and 5 siblings at the time and my dad died from the injuries sustained. My mom told me we all had accounts that were for when we turned 18 when I was younger but the last time I asked her about it a few years ago she said it was all gone abe cause there wasn’t much in there to begin with. I haven’t had any medical bills or other expenses so I’m not sure what it would have been taken out for anyways or how she would have access to it. I haven’t heard anything else about it and I am about to turn 19 in june.