Airline - I don't have an answer for you, but I hope you get one soon...the waiting and repeat BTs really do a number on your mind. I too have twice had solid progesterone numbers with not so great HCG numbers (low and not doubling as they should) - I phrased it as my body just didn't want to let go...no one ever told me why this happens. I hope that your ending is different than mine and you get some good news...they probably won't tell you anything definitive until they do a scan and even then they may want to do multiple scans.