If my first blood draw is scheduled March 6th and the ultrasound is scheduled March 16th...does that mean my doctor thinks I'll be 8 weeks on March 16th? I forgot to ask and now they're closed for the weekend. It's hard to figure out how far along I am bc my last period was at Thanksgiving and on 1/25 I had a negative test. My positive was just this Monday. So I think I'm either 3 weeks or 4 weeks...thoughts?