Hi Zap,
may be to early to tell yet. Im on my umpteenth stim cycle my blood test is due on this wed if AF doesn't show up. I asked the nurse again last week when should i expect AF if she is to show and she said 1-2 days prior to BT so im guessing you are haveing an implantation bleed - i think its too early for AF to show up for you. Goodluck - why not ring the nurse and query this one - its will make your feel better im sure.