I can't cope

I feel terrible and am really upset. My stepmother is out of town with my daughter and started a fight. Said I'm a terrible mother. that my daughter is fat and the reason she's fat is because I don't buy good food. Said again she should have taken me to court to get custody of my kids.
Also told her that she has no friends because she is rude and critical. That is not why at all…Tabitha is very emotional and suffers from severe anxiety and kids don’t know how to handle it when she has a meltdown.
Tabitha is two hours away in Toronto and I wish I could go get her. Tabitha was crying so hard and so upset
When she gets home I am not allowing her to see her (stepmother) anymore...my counselor and pdoc's have told me to do this. This is what she has done before and why my son refuses to visit because of how cruel she is
It is very sad and very hurtful to me and my daughter. She makes me feel like a piece of shit
I just wish I had a way of getting my daughter home. They aren't going to be here till 10 pm or so tomorrow. My daughter is so distraught.
I don't know how she thinks she can criticize me for stuff she doesn't even know
I feel so fucking sick to my stomach. I just can’t deal with this shit right now.
The doctors have wanted me to go inpatient and this shit just pushes me over the edge.
Also found out I do have fibromyalgia along with something else that they said could be cancer.
I hate fucking life!!!!!!!!!!!