Has anyone had a scan at 6 weeks to find egg sac only measured 4 weeks? I went in Friday to have an early scan (5+6). I also had my blood count done which had nearly doubled from Weds (3910 to 6989). But I feel so confused. How can my dates be that out? Prior to conception my periods had been bang on 26 days for the last 6 months. Has anyone else had such a small sac measurement but gone on to have a normal pregnancy? They won't scan me again until the 3rd of Dec. I think I'll go mad!!!