God it's had, I miscarried three time last year. I am pregnant again and it terrifies me. My GP actually referred me to a grief specialist psychologist.
He was great, I saw him just the once because he thought that's all I needed. He assured me it's normal to experience anxiety after miscarriage and to become 'hyper vigilant' as he called it, in the next pregnancy.
He basically told me that I have to change my thought patterns, when I find my thought wandering down the negative path, I need to physically stop what I am doing and change my thought pattern. As he said, you can't change your emotions, but you can change your thoughts. Your thoughts will eventually influence your emotions if you consistanly change them. It's quite exhausting having to talk yourself out of negative thought patterns initally. But eventually it works (or helps anyway), and I feel a lot more positive.
He also told me it was important to use positive language everyday. 'when' not 'if', when refering to the baby etc. You have to plan and make the assumption that everything is going to be OK for the outset. If you don't you are setting yourself up for failure. If for some reason things don't work out, then you greive and move on like every other time. You have done it before and you can do it again.
I felt with my DD that I spent the whole pregnancy assuming that she wasn't going to be OK. I robbed myself of the joy of pregnancy. And I can't do that again. It's not fair on me.
I'm sure you've heard all that guff before, but it's helpful to be reminded sometimes.