This essay post is to Laurel but, really I hope you've hidden your thread now. Mumsnet is unparalleled in its collective womanly wisdom ... and wherever you find wise women, you also find 'tricoteuses'.
I've twice posted threads about personal issues important to my life at the time: I'd say that half my replies were helpful and represented the experienced guidance I was looking for (averaging; one thread was more inflammatory than the other.) AnyFucker, bless her anyfucking heart, posted on both with loads of perception. I've taken on the wise viewpoints I sought, ignored the rest and let my threads die.
People who shout at OPs are, mostly, cartoonising the issue because it triggers their sensitive points. That's not to diminish their perspective, nor what they say. But no thread, other than their own, is about them. If we can understand why they're so exercised, and recognise its relevance, then we are the ones who deserve credit for empathy - despite them.
You strike me as a very sensible, feet-on-the-ground, emotionally sorted woman. That episode must have knocked you for six. Please don't underplay its significance. Sometimes we have to face stark evidence that our life is not quite what we thought it was - then we have to go through some processes [eek]. Nobody's underestimating what's entailed! But some write as if it were all cut and dried. Of course it isn't.
Things can go tits-up for a variety of reasons; many of us know those reasons. The more you post, the more clues we'll gain as to where you need to look for a solution. Some of us have been there again and again 
Children's services don't rush in and turn troubled families into fairytales. They've got experience and perspective. So has mumsnet, by and large. You just need to filter your replies for relevance & common sense 