Daycaremommy,
You should sit back and think of all the input and good advises which you received in this forum, understand and learn from it. It's okay to accept that you made a mistake, and saying sorry to your caregiver may help mending the situation. All you need is a mature conversation.
Just,
Keep in mind that she keeps low ratio so she could give quality care to the children in her care including your son whom you said has special needs. That is something you should be appreciative about.