It sounds like she is ill, if things are really as she's reporting. I'd expect alot of exaggeration though with the group responding as it is.
I'm very ill with a rare disease and happened on a very odd post last night on a Facebook group for the illness I have. It was an incoherent panicked post by someone desperate for her symptoms to be recognized as this condition. And a lot of 'but I have the same x, y and z things happening and so why am I turned away or told it's not true when you lot have this diagnosis'.
I was somewhat torn as I've spent years knowing in my heart of hearts that someone was very wrong about my body (& my family's). So although I never wrote a post like that, I might have done given the right circumstances. I recognize the fear.
And being met with cynicism or if I'd felt somehow rejected by this group, it would have been very upsetting. Maybe it would have made me or someone like me give up, stop trying to find answers. Stop believing in myself and my experiences of my own body.
Buuuuut... I don't recognize the way she described what she's living through. Nothing rang a chord with me. Which is weird, as usually you get the kinship vibe very quickly having exchanged a few basic details.
And I do think that if someone is very anxious and paranoid about their health, then jumping onto these types of groups would be so tempting. And yet, so damaging if she doesn't have what she thinks she has.
Latching onto a source of collective support and empathy might be very addictive to someone with certain kinds of mental health problems. And it's sad for them, and also not good for the other people in the group. In the group I'm talking about, people are living with horrendous circumstances every day. People die. Their families die. Their children die. It's fucking awful and these are people who don't need their kindness and support misused, they don't have enough to give to someone who's not actually in the same situation.
So... it's difficult. How do you know what's really happening behind the scenes? I didn't reply last night. I read others replies who were compassionate and sympathetic (& made me feel like a heel for being skeptical!). But in the main, that's as far as it went, so I guess others were also a bit mindful that too much encouragement might not be the right thing to do.
All you can do is try and do what you think is right.
And in your situation OP, I'd be contacting SS or similiar. And not telling her it was you.