First of all, huge to you hun, I am so sorry that you are having to go through this heartbreak yet again.

I don't know much about foods that can cause miscarriage but when you said that you survive on toast, it did get me wondering. Have you ever been tested for coeliac disease? It is a much underestimated cause of miscarriages and even if you don't feel that you necessarily have any symptoms, doesn't mean that it isn't a possibility. I was diagnosed about two years ago with blood tests and gut biopsy and the possibility had never, ever occurred to me. Sure, I did get a lot of tiredness, bloating etc (plus I had two natural miscarriages and repeated implantation failure) but it seemed so non-specific that I never suspected coeliac.

Just a thought that it may pay for you to get tested? In the meantime though, if you do think that pursuing this may be worth a shot, don't go off any breads or other gluten-containing products as the tests need for you to be eating gluten at the time to evaluate any sort of sensitivity.

Good luck chick, hoping that you can get to the bottom of things and have a healthy bubba in your arms before long.