If I recall your situation correctly, I would call her and tell her of the situation you had last week (or whenever it was) and explain that you don't feel comfortable with the level of care you were being given and that you have found someone that you feel can offer that level of care. Remember to specify that it was an after-hours emergency and you weren't able to reach anyone to get any sort of advice.
In your case, I'd say they need to hear this so they can make changes so it doesn't happen to anyone else. Otherwise I'd say just not ignore them and have your new Dr. request your records. Also be sure to cancel any outstanding appointments you have.