Is there a 4-year old in your life? If so, congratulations. And: I wish you strength and patience!
The other day, when Niki threw a humongous tantrum I remained calm by saying to myself "this is parenting - master class." I had to bring out everything I've learned over the past 10 years to master the situation, including a toy rabbit who was very, very upset with his mother.
When the going gets insane, I recommend thinking like that. Master class. Breathe. Focus. You can handle it.