We fear most what we understand least, so empower yourself by learning everything you can about how your illness will affect you. Ask your doctor(s) what physical, mental and/or emotional changes you should expect as your disease progresses. Search online or at a local library or bookstore for information specific to your illness—particularly for accounts by/about those with the same diagnosis—to discover how others have coped.

https://www.verywellhealth.com/dealing-with-terminal-illness-1132513