yes, I'm glad your embie is safe too until they work this out. did they say at the start that you have problems naturally producing progesterone. because one cycle I didn't have progesterone - I had pregnyl instead which as I understand it is HCG, which then triggers the natural progesterone to kick in. that was a fresh/medicated cycle though so I'm not sure if it makes a difference.
what does the clexane do? could it have affected something?
be happy your embie is still safe though, as Blossom says. this could be the good one and it's a godsend that it's now waiting for your next cycle. I'd keep focusing/visualising on the embie whist you wait on next instructions.