I think how they scan depends on whether they can see all they want abdominally. I had an abdominal one first but they weren't sure about the area of bleeding so then they did "trans vaginal" (although dildo is a much better description).
Here's something I can really worry about: I have a wedding to go to on 3rd January. I'll be 17 weeks. Last pg I did have a bit of a bump by then but not so much that I'd get away with looking like shit wearing a "less than proper smart" dress. It'll be a posh do too. What will I wear???
This is so much nicer to stress over than work tomorrow, which is destined to be grim.