My Daughter Is 24 Years Old And Started Having Balance

My daughter is 24 years old and started having balance issues she comes down the stairs on her bottom because she is unsteady and my wife doesn't want her to fall or hurt herself, she also has lost her appetite we have had a MRI and came back normal and our family doctor wants us to see a nurologist but we can't get into June I have started to exercise her legs by having her stretch and we practice trunk turns and head turns and also practice relation breathing Blood work was ok she is mildly mentally handicapped and autistic can anyone advise me on anything I might be missing