I am concerned that you have not taken your daughter to a mental health professional yet, it sounds like this has been going on for awhile. This is concerning, especially if her teachers are noticing the strange behavior. This almost sounds more than just OCD, and I think you should have your daughter evaluated asap. You need to be proactive with your daughter and her health, this is your responsibility as a parent.
More than OCD? =/ omg I can't take her at the moment because we're on holiday and you know we are comming back to america In two days. I always knew she has OCD but I can't understand what this other thing is. :s
Not to scare you, but it almost sounds a little bit like schizophrenia. I agree with pooty335, you definitely need to get her into a mental health professional ASAP. The behavior you're describing is definitely more then OCD and you need to get her help before anything gets worse. The fact that she's having thoughts about hurting herself or others, or killing herself is very serious and she needs to talk to someone. There are a lot of treatment options out there for all types of mental disorders, but she needs to get diagnosed first by a professional.
I agree with WendyLady03, this does sound like Schizophrenia. The word sounds scary but it is treatable and people do get better.You do need to get your daughter to a mental health professional to get a correct dianoses.
Best of luck to you both!
Definitely take her to a mental health professional, it sounds like she is suffering from more than just OCD.
I wish you both the very best of luck