Karen,
I am so sorry that you are going through this. I can so understand as I have been in your shoes some what. I have had 5 pregnancy and only one DD. Two of my miscarriage were early 5 weeks and 10 weeks and two were late 21 weeks and 17 weeks. It is the hardest thing that one can ever go through.
I am here for you. Any time you want to talk.
Just like you i was looking for answers the only answer i got was that my body wasnt metabolising folate as it should be and it was a genetic thing.
I will be praying for you
. Hugs