Hope all goes well in the scan and you see your bubs sitting safely in there. Ultrasounds are torture for a pregnant woman... I remember being in absolute agony for my first scan cos my bladder was so full, they let me go to the loo to let out a bit. Thank god my pelvic floor muscles were strong then.

I noticed you are almost 8 weeks now. I remember I had my first scan at 6 w 4 days and it was only a dot with a heartbeat at that stage. It might just be possible that it was too early to see much when you went the first time and thats why your dates vary.