Leigh I wish I could say more than 'I'm sorry' because it seems so trite in the face of unimaginable loss. But I am truly sorry that you, and all the other women sharing their childless not by choice stories here, have been robbed of the future you so desperately wanted to have.
I am childfree by choice (I have stepchildren but they were young adults when I met their dad, so I've never really played any form of parenting role). Just a couple of weeks ago, a colleague asked me "don't you have any kids?" and when I said no, but I have stepchildren, she went on to ask - more of a demand, actually - "so did you never want them?" I stared at her long enough for her to start to look uncomfortable and said quietly "luckily I can say no, I never did, because it's true, but the next childfree woman you ask might have a very different answer, so maybe think about what might lie behind someone's childlessness, eh?" and walked away.
Incidentally, I think this: It is well known that AIBU is a bit harsher than some of the other boards. If you're posting about something that requires a bit more sensitivity then other places may offer more support, even if it's not Mumsnet. If you post on AIBU, you generally experience a harsher viewpoint. It might seem unfair but that's just how this board is. I usually go elsewhere with sensitive subjects is a crock of shite. It shouldn't matter which board someone has posted on, if the subject is sensitive then behave with sensitivity! That's basic human decency, surely? Or do some posters really think "wow, there are a lot of heartfelt stories being shared here, gosh, some of these people have really been through it. If only this were on another board, so I could express some empathy for their situations. Sadly they've posted in AIBU so I can only post confrontationally / aggressively / sarcastically / like a goady fucker"?