My daughter is a little over 2 1/2 years old, recently she's displayed some unnerving behavior and I'm absolutely terrified that she's got some sort of disability that needs to be dealt with, she's started repeating things over and over and over again, grinding her teeth, and screaming out at night, to go along with crying over everything and uncontrollable anger ( tearing toys apart, hitting, biting, screaming, etc.