help oh help

I am seeing a new family in clinic, she is not new to our clinic but is new too me, the grandmother has gaurdianship of the grandson and has her own child. I just started seeing them on tuesday and so far she has been back everyday and calling 2-3 times a day about a sick child.( so far the exams have been negative for all the complaints, ranging from cough to diarheaa) I can see she is overwhelmed by the 8 month old and taking care of her own child, so today when she came back in i saw the child and then tried to talk to the guardian about how people can feel overwhelmed when overloaded. She got very upset and yelled at me that I had no right to make judgements about her I calmly pointed out this was just my observation that she was over whelmed and I was not judging her. she continued to carry on and ruminating for 20 minutes about her daughter and everything that is going on in her life. I can see the children are well taken care of, the gaurdian has anxiety and depression issues. She states there is no one to help her out. She was really out of control but calmed down. Until she got to the receptionist to schedule another appt and started all ove again about taking care of the 2 children and all she does is take care of them never leaves the house. at this point my main concern is the 2 children I am worried that she is going to snap. I am calling DCFS in the morning with my concerns, but she has already let my nurse know that if DCFS show up she will know it was me. This woman has a history of being vindictive so how do I protect my self and staff from this women,