Stucki,
I've been silently following your journey since I signed up for B&B last November when I had my first miscarriage. I just wanted to say that I'm so crushed for you that this pregnancy didn't work out. I stalked every day to see your new tests and was so excited for you. I'm so, so sorry that you are going through this again. I can't even begin to imagine what you are going through, but you do seem like a strong woman to have kept trying for as long as you have.
I know you've tried virtually everything, but I was wondering if you have looked into xenoestrogens and phytoestrogens and the effect they can have on fertility and your body's ability to create and/or absorb progesterone. When you said that the progesterone in your system should have been higher given the dose you were on, it made me wonder if this might be the case. I personally know a woman who had 12 early miscarriages and then she started learning about these xeno- and phytoestrogens and has successfully been able to carry 2 pregnancies with making some changes in the things she eats and uses (lotions, detergents, cosmetics, etc.). After I had two miscarriages, she taught me about it and I am now 9 weeks and counting after making the same changes. If you're interested, do some research and feel free to PM me with any questions you might have. I'm not selling any products or anything like that; this is just something that I have learned about and has made a difference for me and my good friend.
Of course, I will completely understand if you're ready to throw in the towel or at least take a long breather and not think about any of this stuff for a while. You're certainly entitled. In any case, big cyber hugs coming your way and I wish you all the best.