Loss of confidence

I used to feel like a fantastic mother. Recently, I've had a sense of failure. I'm not sure if it's two-kid fatigue, my faint feeling of depression, the difficulty of maintaining patience given the challenges we face with WA or if I just haven't adjusted to the way things are vs. the way I thought they would be. Either way this feeling really sucks and I hope it's primarily in my head. I'm not looking for sympathy, it's just good to get it off my chest. I think we, as Moms, don't talk about the negative nearly enough and it makes us more isolated when we attempt to deal.