Targeted therapy for metastatic extrahepatic CC

Hello CC warriors. I have been digging through many posts and amazed at how open and genuinely caring this group is. My latest news has brought me back to reconnect and search for answers. I have developed two metastatic tumors in my abdominal cavity. Although fairly small (1.5 and 1.7 cm) I have an appointment with my Oncologist Monday and looking to be as prepared as possible.

Questions: Any extrahepatic (Klatskin tumor) members have any targeted therapy (pembrolizumab/Keytruda) experience to share?

My intro w/ background can be found here : http://www.cholangiocarcinoma.org/punbb/viewtopic.php?pid=96567#p96567

Thanks You!