He does have ticks and I know that is part of his anxiety. I spoke to my son last night and told him that I was going to have him tested and do all I can to help him and he was happy about it. It just confirmed that something is not right. I called his neuro doctors this morning.
Believe it not, poor writing skills and lack of focus (as well as homework issues) are all signs of anxiety. Does he have any other anxiety behaviours? I might suggest you google the phrase "anxiety behaviors in children" or "anxiety and school" or similar words or phrases to see if any of the descriptions remind you of your son. Just wondering .....
Have him tested again, sometimes that changes. My son didn't show his ADHD until he was in 4th grade and he also was suffering of anxiety.