Not sure how far along I am?

Lauren
I'm not sure how far along I am.. I went to the doctors last Friday to confirm my pregnancy and the doctor said based on the urine test she didn't think I was any more than six weeks.. I have another appt with her this Friday, when do they usually do a scan to see how far along you are? My boobs are sooooo massive I can't even imagine how big they'll get when I'm really close to giving birth!!!