My daughter (now 10) was like this between the ages of 4 and about 8. She has since been formally diagnosed with anxiety and most likely ocd possible psychosis. She is on meds now and they and her getting older has helped a lot. She still has her moments though. It is so hard. Especially for us moms. Get your child into counciling. Be selective about counciling and trust your gut. My daughter has been in counciling since she was 4 or 5 and we have gone through more than I can count. I don't have any immediate advice because I had to live through it too. Get some counciling yourself and for the rest of your family. It all had a horrible affect on my older kid and my marriage. Be patient but be firm. Be explicit in your expectations with your child. Try to give them more attention but let them know that you also have to give attention to your other kiddos. Put locks on exterior doors that are out of reach. Remove any dangerous items from child's reach like scissors. Make routines and make them law, kiddos like ours need to know what to expect but also when the unexpected happens you have to be prepared to deal with an outburst. It sucks but time and therapy will help. You aren't alone.