I'm so sorry, i really feel for you and cried reading this.
Tragic but an accident, your Novi knew you loved her very much, i can understand how much grief and guilt you must be feeling and how nothing will make it feel really better right now.
But please take as much time as you need to heal and do what helps or comforts a lil, and really it wasnt your fault, we do not know that these things would happen.
Im so sorry for your loss.
Novi loves you and you were a great mom.
My deepest sympathies and prayers to you during this difficult time.