pregnant after miscarriage..

I had a miscarriage on November 12th measuring at 6 weeks. On November 29th my hcg levels were back to normal confirming my miscarriage was complete. I took two home pregnancy tests on December 19th-both positive and one said 2-3 weeks. I did not have a period in between. I have been to the doctor twice for blood tests and my hcg levels are rising nicely..I go again tomorrow. I just hate not knowing how far along I am and they say I have to wait until I'm 12 weeks to get a scan.. this is my 7th pregnancy..I have 3 beautiful children (two miscarriages before my first baby).