My son is 3.5 and driving me insane. He kicks and hits me pulls my hair purposefully throughout the day if I seem upset he laughs. Nothing makes him stop I have recently started just locking him in another room until he apologises. It doesn't stop for long, it could happen as soon as he wakes up. I can't get him to do anything as soon as I seem angry he laughs at me and tries to anger me more by doing the opposite of what I've asked and/or hitting me /kicking me/headbutting/pulling my hair. I'm so sick of it and am starting to actually resent him now. WWYD?