Hey Amy, I also followed your story and was so sorry to hear of your last miscarriage. I think a transabdominal cerclage (TAC) is a great idea, especially if someone thinks you are a good candidate now, many drs think it is far too invasive but if thats what it takes Id say go for it. I consulted with several drs specializing in TAC. dr haney in chicago is great source of wisdom and information so do talk to him if you havent done so already. He will also do free phone consults so you will have one less travel to do. I hope you are able to get some answers and can move forward with hope that you will bring home a live baby!
Best wishes to you!