I left the toddler alone in the bathtub
What made you think that the toddler would be okay without you there to watch him?
I was feeling quite spaced out.
It's wrong to leave a child alone while in a tub as the child can easily drown and you will be found responsible for that child's death. As a parent, you have a responsibility for the well-being of your child and part of that responsibility is to ensure that your child can bathe without being in danger. The next time that you are feeling odd, you should get someone else to bathe your toddler or put it off until you can watch over him or her with due care.
I was trying to think about my toddler and I forgot that the kid was in the tub. There's nothing much to do about the situation. It's not that big of a deal to me, should I be blamed for everything?
Something bad could have happened when you stepped away from the tub. You should always be there when a child that young is in the bath tub.