O. M. G.
Brat is an understatement.

She's so naughty lately. If I tell her No she either laughs at me or shakes her head to tell me no... if I really tell her off she will cry uncontrollably for anything from a couple of minutes to 30minutes. Sometimes she will throw herself on the floor and other times she will just stand and scream and scream and scream!
I'm literally at my wits end with her now... she climbs things she shouldn't, bangs stuff on the tv, bites, pinches and no matter how I try to tell her not to I get the same screaming, crying response. She's up till 4-5am every single night because her back teeth coming in threw her soooo far off her routine.

She's not overtired because she is sleeping most of the morning, as am I because I physically can not get up in the morning after so little sleep for the past few months.
So now I don't know the best method to approach this with. I don't want her to be one of those kids that cries to get their own way so I don't want to be trying to comfort her when she's crying... after she was told off so I would be going back on it if I then hugged her.
What's the best method for dealing with this behaviour? I know there are plenty of mum's on here and I would appreciate hearing different methods etc.