Hi positive!
Also subbing here as we are in the same boat! DD1 was transfer #3 (born Aug 2010). We are looking at a FET in May this year (got 6 embies frozen) and I am just about to start a month on the pill (loooong story but I don't get a natural cycle) in order to get AF a couple of times before the transfer.
I would love to know how fast it's happened for other people!! Good luck with your next transfer