I'm so sorry Holly
I just got my "answer" a couple of months ago, after having 4 miscarriages. I have a mutation of the MTHFR gene, and am missing Metfolin, which is necessary to convert folic acid into what it needs to be to be fully absorbed. So my body was only absorbing about 50% of the folic acid I was taking. He put me on RX prenatals with the Metfolin in it that I'm missing. We also found out I have some form of Thrombophilia, which is a blood clotting thing, so blood clots could have been a cause as well.
Both of my problems can be treated while TTC'ing and pregnant, with the RX prenatals, baby aspirin, and Heparin. So there is hope. Even if something is wrong, just keep in mind that a lot of the stuff that causes repeat mc's is treatable. Good luck, and you'll be in my prayers if that's okay.