Sensory issues rarely stand alone so if you are seeing behavioral problems (even if not at school) along with major transition problems I would recommend seeking out a complete reevaluation. Schedule an appointment with her pediatrician and ask for a multidisciplinary evaluation with a developmental pediatrician or pediatric neuropsychologist, Occupational Therapist (OT), and if she has any speech differences at all (delays, trouble answering questions, echoing, adult sounding speech, not connecting with other kids socially) then you will want speech as well. A lot of peds will blow off a parent request at this point saying she's just having a hard time with the move but I'd push it.
What are her play behaviors like? Does she play well with other kids? Have unusual or obsessive interests? Do any lining up of toys in lines or formations?
Get a copy of Ross Green's The Explosive Child and read the thread at the top of this board for behavioral help. It makes a difference for many kids but it's no substitute for finding out what's really going on.
