First Visit

So we just got back from visiting Michael's mom and friends and family in Bradford. It was a wonderful weekend, although the weather is getting chilly there now - something I'm not quite used to. While there, I scheduled an Ob-Gyn appointment for when we got back to Maryland. Everything went well, and I have to go back in two weeks to discuss the results of the tests. The doctor told me I'm about 7 1/2 weeks along (check out my new lilypie ticker ->), and that the baby was conceived on the 13th (?). How accurate are they with that? I was alone then, Michael didn't move until the 16th! I also figured out that they do calculate from your last menstrual cycle - which also doesn't make sense to me. Oh well, this whole thing will be a learning experience for both of us.