D.M.
Mine is almost four and I'm having a similar experience. Sometimes you want to scream right along with them. I don't belive it's aimed at us or purposeful - just that they need something. As someone suggested, maybe it's just more mommy time and less structured activities where she feels she's in control. I did find with mine, that involving her in helping w/ dinner, getting things for the baby, dressing herself, doing all she could made her feel better - happier, in control?? Also, try to talk with her when she has an outburst. As hard as it is, try to remain calm and ask why she is so upset? Listen and help her find a solution to what's bugging her. This obviously doesn't work all the time, but might give you some insight into what's bugging her. I'm sure the sleep isn't helping, but I can't belive that is the whole story. Hang in there.... when it's bad, I try to fastforward to the teenage years, and I know I'll wish I was in the 4s again......