my first thought was "did something change". It could be as simple as you changed the color of his sheets? Sometimes very small changes that others wouldn't even notice can set off our kids. I didn't see where you mentioned you had sought any help for him. Maybe trying some occupational therapy or home based services would be in order just to help. I'm not a big fan of medication, but they have had luck with many meds to help with the effects of these disorders.

Good luck, I'm been in the exact same position as you and unfortunately in RI it doesn't appear to be much in terms of services.