Most important thing is to take a deep breath and know you aren't alone. No two kids are the same but with all the people on here elements of your experience will resonate with others, they do with me. DD used to be impossible in the mornings before school, doing anything but getting ready. Now she is older she is better. She has worked out how long it takes to get ready and won't start dressing or doing teeth until that time!!
I was thinking about the Tourette's diagnosis. When DD was having a particularly bad year at school she had some interesting repetitive behaviours, mouth movements like yawning, chewing hair etc that went away when the anxiety was removed by going to a full time GT class. Sensitive kids do odd things. Of course he may well have Tourette's but anxiety will certainly exacerbate tics.
Is he being challenged at school?? We discovered DD was more gifted than her initial SB V indicated when she was retested but also when she was eventually challenged appropriately she took off! When not challenged she has presented with anxiety and depressive symptoms.
For exercise a trampoline was the best buy we ever made. She jumped for hours.
Let you know how the visual spatial testing goes.