I think that sounds like you too 



And I know so well that feeling of time slipping past and everything going past you and you not being able to join in...
Someone on mumsnet once said people who are depressed and traumatized can't make themsves plan ahead more than a few mins, or an hour, or a day... Because deep down, they don't know if they will be alive then, or if they will be able to function... They called it 'foreshortened future' fancy name, for being so scared and broken, you can't think ahead.
That sounded like me then, and you now I think too?
Trouble is, you've got a timer ticking away in your tummy, and you need to do something, before its all happening at once and you can't cope.
Ask your GP about treatment for trauma and PTSD, ask about medicines and counseling. And ask about mother and baby units... I know spaces are so short but I think it could help you so much.
Just ask, no one new yet, but I really hope your GP is doing more behind the scenes to find all this stuff out as it's not really ok to leave you without help, and support, even if that's what you are saying to her. She should be coming up with options and explaining stuff to you.
By the way, the whole antenatal care thing, they can help you get support, like, consultant led care, minimal invasive examinations, c-section to avoid bringing back awful memories... It's worth getting into that system, if your GP can help you and work with them to make sure you are treated very gently and differently right from the off...