One of my closest friends has gone through this, but it started much earlier in her pregnancy. Sadly after her lazer surgery the situation reoccurred and she had to have it done again. The good news is that there are some wonderful doctors who are becoming very experienced in this type of surgery and their outcomes are good. My advice is to write down any and all questions you may have, and to check out TTTS support groups of which there are at least one or two on facebook. I will be thinking of you and your girls.