So much to take in sue I can imagine you didn't get much sleep last night. I don't know what kind of blastocyst we had but I'm pretty sure they weren't hatching :-( Babee I thought if the pregnyl was still in your system you would get a positive hpt? Surely it would still be in your system? I don't think I would be game enough to do a hpt its torture. My nurse specifically said not to do one. It may be too early for the test to show an accurate result.