Re: US saw only a sac?!
If you are nursing and your cycles have been unpredictable, I really don't think I would worry too much yet... if you are saying the most you think you could be is 6 weeks along then there's a very good chance that IS all they'd see at this early of an ultrasound... I would wait at least a week or two and get another scan.
* CARLY * married to Lee (3.19.05) & Mommy to 2 Amazing Boys
Logan (12.20.06) and my RAINBOW Landon (06.28.13)