Do you have any mums groups that you can go to? Maybe contact with other mums will help. Also, try to take some time out for yourself - listen to music, read, have a bath, go for a walk.

It is really hard taking care of children. Really draining and all-consuming. I find it helpful to think about how I really want to be there for my children and watch them grow up. They need me, as does your little girl. That gives you a purpose and a reason to go on.