I'm feeling exactly the same way. I did have a scan at 8 weeks where we got to hear the heart beat but i'm still very anxious about our 12 week scan. I've had 2 previous miscarriages and this time around i'm having no ms at all which is making me very nervous - never thought i'd be wanting myself to be sick!
I used to think all the waiting involved with TTC was bad but its nothing compared to this. Trying to stay positive...

Goodluck to those having their scans soon - i look forward to hearing how you all went