Weird math

Went back to the doc for blood test #2 today. Everything looks great they say...and my levels are high. Levels of what, I don't know. There's a lot of things I don't know. I did ask the nurse how far along I was. She said....FOUR WEEKS!. I asked how that was possible because the babies have only been in there for two. She said that they count starting with the first day of your last cycle. I guess the embryos were living in a dish for 5 days without me. It's just weird math to me, but hey, I love the fact that I'm 2 weeks further along than I thought I was. That means I've got only two more months of highly treacherous times left. I'm dreaming of reaching my 2nd trimester so that I'll feel more stable.