my daughter is 7 years old.they discovered 2 years ago that she has ADD.her behaviour is not exceptable.she's constantly throwing tantrums, slamming doors, hit het head against the door or wall and her language is very bad. i have 3 children, 3y end 5 years and my house is turn upside down with the 7 year old. there is also signs of autism, she can hear but if you call het she just go on with what she is doing. she screams alot while watching tv or running thru the house.i did everything i possibly can, talk nice and soft, yelled at her but it gets wors by the day. she is using ritallin LA 20mg per day.time out does not work, hiding does not work, taking things away does not work it makes it wors, she would scream and brake things and slamming the doors and hit her head against the walll or door, it is almost if you do those things she cant handle that, it's like you taking the world from her. What can i do because i can't go on like this, my family is starting to fall apart because of this. Please help me or direct me into the right direction.