OMG! I need to vent for a moment!

Lily is so testing my boundaries at the moment, it's giving me the S#!@%
The tantrums just will not stop. I say no, she whinges louder, i raise my voice a little, she turns into a complete drama queen. Yells no at me and screams and thrashes herself around. She is getting into so much trouble and she totaly knows it and laughs about it. If i go into a shop, her arms stick right out trying to grab everything in her reach! Will this very end? She is starting on DF too. We can't handle it anymore! I admit, some of this is contributed to pregnancy hormones, but come on! It's worse than i've ever seen any toddler behave before!