Motor body problems

Hi, I'm wondering if anyone knows anything about motor problems in autism? I know it's very common in children and infants on the spectrum but what about adults. Can it happen suddenly to adults? I'm asking as I am struggling with motor problems I.e. with walking and my hands aren't quite right. I suffer from anxiety in the extremes and I wonder if that's behind this? I read online it can cause motor and movement problems but I'm interested if it can also be part of autism. 

I'm struggling with walking now and my left hand is temperamental at times. 

Hope you can help me with this :)