I am sorry to hear of your loss. A m/c is a difficult thing to go through, particularly when you've been trying a while. My first one was after 3 years of trying & my second after 9 months of trying with a new partner so I understand what it's like.

Before you beat yourself up about this please remember that the stats show that 1 in 3 pregnancies end in miscarriage... usually before 12 weeks (most well before that) and that most doctors will tell you that there is nothing that can be done to avoid it. If you have a history of miscarriage (usually 3 or more) then they will start looking into causes, but before that they will pretty much just say it's inevitable. What I'm trying to say is the result would most likely to have been the same regardless of which doctor you saw, they pretty much all would take the wait & see stance that is so popular with the docs & early bleeding.

Make sure you get the test done next time 7 days after ovulation which will show more clearly if your progesterone level is low or not and that way you will be able to discuss what measures need to be taken to support any future pg.