My daughter is mildly autistic with some sensory integration problems
as well. Since she was not much older than newborn, she has been doing this. The behavioral doc, the OT and the psychologist all say that it is definitely something, but they don't know what. This goes in cycles, she will have about 3 weeks of not doing it, then a week of doing it after naps, a week of doing it pretty much all the time, and a week of intermittant again, followed by a longer period of not at all.