Hi Ladies,
I really hope you don't mind me posting this... I have been following the thread as I've struggled with my 7 day LP but I have finally fallen pregnant!
I live in Belgium and the healthcare here so far has been excellent, I can't fault it. I had been struggling alone for a while and went to my local Doctor in January. In the following 2 1/2 months I had ultrasounds and 4 rounds of bloods plus 3 consultant appointments. Everything was normal, including my progesterone. However, the doctor here explained that our bodies can be slightly resistant to the progesterone we make. Therefore, despite normal levels, a progesterone boost may help. I tried it, only one pessary a day and I fell pregnant on my first cycle.
I'm not suggesting this is the answer for everyone but it worked for me so it might just work for others.
Keep trying 
Roxy x