She has these mega emotional outbursts, blows snot all out of her nose in anger, spits and screams.
The only thing I end up doing is getting so frustrated and shouting and putting her in her cot. She still cries.
I hate this because I love to try to understand them (I have three small kids) validate their emotions and feelings by being calm too. But after her just doing it and not stopping I end up grabbing her, takin her upstairs and leaving her for five mins to try and calm down. I have never left them to CIO but I feel like trying for five mins to let her calm herself as she doesn't want me is the only option. What else can I try?
Main factor is (just bows outburst) she is teething her 'fang' teeth, and two molars. She's very over tired. But having a newborn and three yr old too I didn't know what else to try.
Now I'm sobbing. 
Plus snapping at dd1