This morning there was blood on my sheets.  I raced to the bathroom, ripped off my underwear (and panty liner -- my husband with a smile of great satisfaction always asks me if I've put on my panty liner to guard against progesterone suppository seepage.  He just likes saying "panty").  The whole time I'm thinking, "Implantation bleeding! Implantation bleeding!"  I hurriedly try to count the days in my head since I did the transfer.  I can't do it because my heart is beating too fast.So the panty liner is the most pristine white thing I've ever seen, so I investigate every potential source of blood from my body.  Nothing.  Nothing nothing nothing.I go back to the bed and investigate the brown spot.  Chocolate.I have a feeling it's implantation chocolate.