I went in today for my first scan. Thought to be 7 weeks and 3 days. Only saw a sac...said I was more like 5 weeks. Just doesn't add up! How did I get a positive pregnancy urine test on June 5th? and my last period was may 10th. Blood work showed my hcg levels are going up, which is good. They said either a very early pregnancy or stopped developing at 5 weeks. Going back on the 11th for another scan. Has this ever happened to anyone?