My 22-month old has been testing my patience and it is very hard for me to control my temper. I tend to raise my voice at her when she acts up. I noticed when she is with her nieces and gets mad at them, she screams at them. Is it because she is imitating me? Is it too late to reverse this and have her not scream? Or is it a phase she is going through? I am afraid I sent her this message that if she is angry that you raise your voice.