Are you with her most of the time? I found my 2 are most likely to lash out at me as Im the one seeing them all the time iykwim? sometimes i think we get sick of each other
There are some good books which explain new babies to los... im having a mind blank and cant remember the title, hopefully someone will post soon and remember, it is a confusing time for lo, but also you need to deal consistantly with the tantrums, so she knows what response she will get, if your giving in she will soon see that as a way of getting what she wants! They will pass so dont worry.
Jessimae has had a few good ones lately aswell! maybe its the 3 year thing!