Are her behaviors consistent or do they ebb and flow? Is it worse when she has been sick? Did they appear out of no where? Are there times when she does not exhibit the concerning behaviors? There is even a symptom called the exorcist syndrome when a child loses it like you have described. Does she act remorseful and ask for a hug whn she is "done"? I only ask because anytime OCD is present I suggest looking into PANDAS syndrome. My ds has it and we are soooooooooooooooo much better since we got have figured it out and gotten treatment. Doctors will resist testing someone that age for strep I would also include mycoplasma but I would run a blood test and check ASOcand Anti- DNASE titers. If they are high you might be on to something that is treatable!!!
! If you have any questions let me know.