Just a quickie as I thought I may be able to help with the conception dates vs lmp date issue. A UK IVF site I sometimes look at called Fertility Friends has a due date calculator on it which gives you the choice of lmp or egg pickup date (I think they call it Egg Collection here in the UK, although I should know shouldn't I!!) Since that is the day of conception it is exact. It will then give you an exact age of your pregnancy for today and a whole lot of information on what is happening at each stage.
I hope I haven't crossed any lines I shouldn't cross by mentioning a rival site!
Bookmarks