Emerald I have felt exactly the same as you!
Isn't it funny, when you are TTC all you can think is I will only be happy when I'm pregnant again, then you get pregnant and the goalpost moves to 'I'll only be happy when I see a heartbeat', then 'I'll only be hapy at 12 weeks'...etc etc
I think Twinkie is dead right and it's how we protect ourselves. I made a deal with myself a few weeks back that if I had a good scan at 13 weeks I would start to believe in it, and even though its hard and I don't feel connected yet, I have at least started to feel a little bit of hope now.
It really does get easier as time passes, but we won't be happy until these babies are in our arms, I think that's natural after such a horrid experience.
And then I have a sneaky feeling that a whole new world of fear and worry will open up to us!