My daughter and cancer

My 13 year old daughter was diagnosed with ovarian germ cell cancer in March she was on the brink of death and had a really big tumour and an ovary removed. She had chemo and we finally got told shes in remission. Our lives changed shes autistic but was able to function and go school and be somewhat of a happy 13 year old  but now  I have had to stop working to look after her as it has all made her autism worse. Financially im now struggling because ive lost my income and we  found out recently that she has a cyst on her remaining ovary that now needs investigating. I barely sleep with worry all the time. How do you keep going when you can barely function through the anxiety and worry for your loved one?