Its a 50/50 chance for getting braces?

Today I went to the dentist because whenever I wake up I feel my teeth sticking out in the morning, cut the story short I hear I have a overbite and I've grown into sleeping with my tounge in a certain way. I have straight teeth however, like my Mother, but regarding that anyways. My dentist is sending me to the orthodonist to check out if I need them. What do you all think? My Mum thinks the more she thinks it the more I need them. Thanks for the replies..