Random Tears

We have the most random tantrums at present.  It's really odd what sets her off, she'll cry when DH goes upstairs to change when he gets home from work, she'll cry when I take the rubbish out, she'll cry when I answer the door, she'll cry at certain things on the TV, she'll cry if we're sat on the sofa & I get up...according to our health visitor it's all normal terrible twos so I'm left wondering how our other two year olds are fairing.