So I want to see how 'big' my baby is, as in how far along I am, and what the cluster of cells looks like at the moment. I know you can go on those week by week things and have a look, but I am only about 2 weeks 'actually' pregnant but the due date calculator tells me I am exactly 4 weeks pregnant. So do I look up 2 weeks or 4 weeks on those week by week thing? Thanks