Sad news for us

We found out on Thursday at our 18 week scan that Twin B had stopped growing around 16.5 weeks and had no heartbeat. We are devestated at his loss, and also very worried for Twin A. As they were mono/di there is some danger for our little survivor to get blood clots via the shared blood vessels in the placenta. Our high-risk doc said that if all was looking well through the next four weeks, he would be happy. We appreciate your thoughts as we cross our fingers through this nerve-wracking time <3