I'm on day 6 of 2ww (counting et as day 1). My embryologist told me that implantation would take place between day 5-7, if that helps.
I too have been analysing every twinge and worried about the "normal" AF pains I am having, although all my friends who have children have assured me that they all had these pains during their pregnancy's and it's nothing to worry about.
I was sick this morning and have felt nauseous this afternoon, but have convinced myself I'm coming down with a bug as it's far too early for it to indicate anything else, isn't it?
Good luck to everyone. I'm testing on 27 October and definitely not doing it early! I've booked the day off work though, in case it's a negative (maybe I should be a bit more optimistic!).