I hate that she makes you feel badly! Yes, I really hope it's a wrong result but if it's not than thank goodness you found it!
OK, so this might be hard but something you said tickled my memory:
(Warning: looking back at your history here. I am sure it's what you totally already know but I though I'd mention the patter. I am so sorry if I am way out of bounds here.)
I was searching your posts because I remember that your last PG had issues right after you went off progesterone? At least, I thought I remembered that but I can't find the post. I did find this older post from you...
October 5 2009
...saying you stopped PIO.
So, in my totally non-medical opinion... it seems like for some reason there is a possibility they your body does not kick in with the right progesterone and your Chicago Dr. should stick-it-where-the-sun-don't-shine on this issue!
I say stay on it, keep going with it, get tested often and keep listening with your doppler!
Hugs to you and I hope this all is nothing! Glad you did the next shot!