OTTMummA, that's really interesting, and very sad, and rings a lot of bells.
Phobias (and a lot of mental health issues) aren't logical, is the thing - I've been asked why I didn't address the issue before I got pregnant, and all I can say is that I was so terrified/repelled, I just wanted to bury my head in the sand about it, and did so. (then, ironically, after putting off the thought of babies for years - almost too long really - I had trouble conceiving. Imagine what a fun year that was - scared I wouldn't be able to have children, terrified I would have to.) I know it sounds mad that someone could desperately want to have children, and then beg for a termination when they were pregnant - but it does happen, it's not a logical condition, and I understand where they are coming from.
When you are not pregnant, you can mostly avoid the issue - switch over if it there's a scene on the telly, leave conversations that head that way etc. And even once you're pregnant, there's still that 1st trimester to get through before it hits home, for me anyway. I wish I had tried to tackle things beforehand, I can see that would be more sensible! but truly, it's one of those problems that has such a stigma attached to it, trying to be honest with yourself, let alone other people, is incredibly hard. I've been upfront about my past depression in a way that I never could be about tokophobia. Once in a while a thread pops up in MN from someone who seems to be phobic and wants to try and do something about it before TTC, and they get some shocking reactions ('if you won't even try and have a VB, you don't deserve children' etc, or 'oh, I get scared, we all do, get over it'.).
As an aside, seeing images of birth in a book at an early age were a factor for me. It's really not a simple thing to unpick, the roots of it all, and I'm not trying to here - but for someone who was being sexually abused, the images had an association and an effect they probably wouldn't have had for someone else. That's still true for me today. Even typing this is making my heart race and my stomach flip over.
However, I do see that for women who have an anxiety that stems from lack of info and understanding, then some guided education would be good. I think that's a slightly different kettle of fish though, and I don't want to belittle other women's fears when I say that. (btw, I'd love to try NCT classes or similar for stuff about post natal care and BF-ing etc, but can't really risk a full on panic attack the minute they start discussing VB. Wouldn't be much fun for the class, either)
(should add, I don't want to hijack the thread - though I want to be clear I'm talking about me here, not second guessing or diagnosing the OP in any way).