Hi Sarah,
I recall reading your previous post about this. I'm so sorry. This was truly a tragic "accident". I know you're in line for some counseling which will be beneficial. I want to just toss this out this thought...
The texting thing causes you so much stress and grief. What if you blocked the texts for while while you get yourself together? It sounds to me you've done everything you could to show your remorse and sorrow about the accident as well as your concern for the baby and your daughter, and all you get in return are nasty texts. It may be a good idea to take a break from the constant barrage of guilt.
Positive thoughts