Saltire, there are several elements in your post that make your son sound very similar to my DS1 (10), who is dyspraxic and dyslexic.
We wash several outfits every day because he spills everything!
He is very accident prone, and he has a benign hand tremor, which makes things difficult for him.
He is a very tactile, affectionate boy, and very easily upset. He doesn't cry so much now, but he used to.
He's fiercely loyal to all his friends, and is devastated if they ever fall out.
He used to worries about EVERYTHING, and had trouble getting to sleep at night as he had the weight of the world is on his shoulders.
This has lessened as he's got older, and more able to put things into perspective, with our help.
He falls over things, walks into things, trips over his own feet.
His co-ordination has got better gradually, and he has become a pretty good skateboarder in the last two years.
He's been doing karate for about a term, and he loves it! It's great for his balance, and for his self-confidence.
We bought him some circus skills items for Christmas - diabolo, juggling balls, rola-bola - and he loves practising with these.
We've been down the Child Psychologist / Consultant Paediatrician route. They couldn't really do a lot, except put us on the 11 month waiting list to see the Occupational Therapist and Child Physiotherapist.
He went and had an assessment one afternoon, which he loved. But we just got a leaflet with advice to get him to do things to improve his hand/eye co-ordination eg: washing up, threading beads.
Obviously you should get your son assessed if you want to. All I'm saying is that the O.T and the Physio had no magic answers for us, and you could probably start helping him now with a bit of research - if you think he is dyspraxic.
Games like Jenga and Mancala are good for my DS1.
Making things with clay and playing with GeoMag are also helpful.
I would also advise you get your son's eyes tested. DS1 had glasses with coloured filter lenses, and an overlay for reading for a while. They couldn't tell us if this was helpful for his dyslexic symptoms, or his dyspraxic symptoms, as they are closely linked.
DS1 doesn't have concentration problems, either.
HTH.