Hi Mia,
I think your embryos are actually in better shape than mine from the start because they actually all had made it to blast. At the time I did my fresh IVF, we had agreed with the clinic that they would let the remaining embryos go to Day 6 then freeze whatever made it to blast. Well, for some reason (which I still don't fully understand), they ended up going ahead and freezing them on Day 5 as morulae instead. From what I gathered, they were afraid they'd start hatching that night and be too far developed by the next day (you would think they'd have at least one embryologist on shift during the night to handle such matters?).
With Day 6 blasts, they would probably thaw them out the same morning.
I don't see there would be a point of taking them an additional day? They are already where you want them to be....
I read on a question and answer forum with an embryologist that Day 6 blasts are only slight less likely to implant than Day 5 blasts. I think the comparison he made was a matter of a very small percentage difference between the two (I think it was 4%). That would be encouraging to me if any of mind had actually made it to full fledged blasts at the time of transfer!!

!
I gave in and took a HPT today (5 dpt) and, of course, it was negative.
Why do I do this to myself?
Regarding the puppy, my DH isn't totally keen on the idea either. He agrees as long as it's understood that he doesn't have the time to take care of it so it's my responsibility (i.e. if the puppy destroys all our new furniture and makes the cats miserable then it's my fault).
In all honesty, I don't think the cat jumping on your stomach would have had any effect on your outcome. Just think what a sparsely populated place the world would be if such things could prevent a pregnancy from happening. I mean the embryos were very well protected and something like that wouldn't be able to knock them loose. I look back on things that happened or things that I did during my first cycle too and wonder if I messed it up somehow (like by walking briskly on the treadmill 4 dpt) but then I try to force myself to be rational about the whole thing.
Anyway, time to get off the computer and try to do something distracting (or maybe even productive) for a few hours!
Staci