Sister has cervical cancer diagnosis

Hi, it's my first time posting. My sister has just yesterday discovered her back pain and irregular post natal bleeding is caused by cervical cancer a tumour affecting her kidneys. I am so sad for her, this situation, and worried about her road ahead. There's so much uncertainty right now with more tests and scans to come, and while I'm trying to be calm and supportive I feel like I've been kicked in the stomach. I feel so emotional as well as my mum who has been to her appointments so far and is also quite upset as it was such a shock to hear. I'm 4 hours drive away and just want to go over and give my sister and my mum a hug. don't really know what to expect writing it down and I don't have a question as such but I think I might feel better sharing my thoughts..