Depressing phone call

Yesterday afternoon, while we were driving home from S. Missouri, I got
a phone call from Diane. She says the progesterone test I had last
Monday showed that no ovulation had occurred this month. I said, "But
what about the smiley face?!?!" She said she didn't know, maybe the
ovulation was later than we thought--in which case the IUI probably
missed it anyway. She wants to switch me to letrozole instead of clomid.
As far as I can tell letrozole isn't even approved for infertility
(yet?), although there are lots of people using it for that, with some
apparent success. It's a breast cancer drug, listed as "known to cause
birth defects if taken while pregnant" and therefore approved only for
use post-menopause. It works by suppressing aromatase, whatever that is,
and thereby preventing the release of estrogen. Or something.

But here it is, day 14, the day I was supposed to be able to take a
pregnancy test. My period has not yet started, but I don't feel very
optimistic.