Relax! You are normal and so is your daughter. I have a 3 year old girl and I have had the same thoughts, “Where is this coming from?” I am unable to have more children, so my blessing daughter is an only child, so I know she isn't learning from siblings and I keep her at home, so it isn't peers. I have begun to think that phrases such as, “Leave me alone!”, “Go away!”, “No!” are programmed in at birth and come out at a certain age... I am having the same trouble at nap time, she either just will not sleep, or I find her up playing when I thought she was asleep. She also has very random public outbursts, that nearly take me to my breaking point every time. My daughter, is otherwise a very sweet, smart and beautiful little girl. So, it breaks my heart to see her spiral to this monster from time to time. But I have learned that I have to address it. Depending on what is a suitable punishment in your home – use it. I found myself hesitant to punish my daughter, because I thought, “She is always SO sweet, she just must be tired, this will pass.” I am discovering that yes, it will pass, but this is a phase that we will have to outgrow together and not something a nap will fix. Try to be as attentive as your sleep deprivation will allow and watch for warning signs. I have found that sometimes I can ward off full blown outbursts, if I very firmly address it soon enough. Also, my daughter had become more of a little person and less of a baby than I was realizing. I had to adjust the way I was thinking about her behavior. She is no longer a 1 year old, who a nap will fix anything for. She is thinking more on her own and I needed to update her boundaries. So, now that I have laid down some new, yet very firm, boundaries, we are doing better. Good luck to you, as it sounds like we will have lots of fun at ages 13, 16 and 18... :)