Thanks @TandR we got them back and both were extremely low - lowest we've seen my levels! No idea why AF hasn't shown up either because she arrived when I had a higher level of progesterone last month. So now we wait for her to show and then on we go. The nurse seems to think my positive on Saturday would have been an embryo but I'm wondering if maybe it really was pregnyl. Maybe I've been holding it for longer for some reason? I'm not too sure but I'm going to ask for blood tests to monitor me throughout the next (and final) cycle.