Has anyone slept for a week in a roll?

Hi, it is not good for spine to be in such position during night. It is important to put pressure from the weight away from spine and to relax. Have you considered that there is some reason why the child is sleeping in that position? Perhaps, it is dreaming something and trying to protect itself. There is also a chance that it has been watching a cartoon or film or has been influenced in some other way to sleep in that position. If the child continues to sleep like that go to consult a professional.