Re chemo mouth I found the mouthwash given to me by the chemo nurses made me feel very nauseous so I used a commmercial one from the chemist if I got sores in my mouth. I also had specially strong toothpaste from my dentist.
i am so sorry about your diagnosis. I am not going through what you are going through. But I found listening to some special music helped me. There was some music I dreamt about one night, I found it on ITunes and often listened to it and found it calming. As I type this I am listening to some very peaceful music composed by Hildegard Von Bingen, who lived in the 12 th century but sounds very modern - Everyone will have their own music they prefer.
Counsellors always recommend mindfulness meditation, the Cancer Council has free cds of meditations they will post to you. I am using one and find it helpful.
Work can be very interesting and stimulating and fills a lot of hours. Without we can feel lost. In time most of us learn to appreciate the freedom and space of not working. Time to lie and listen to music and stare at the wonderful nature outside our windows. To walk the dog. Time to take an interest in something we always liked, or to explore a hobby. To watch silly but enjoyable tv programs, I love Great British Bakeoff. It's an adjustment that happens over time. Volunteering can be good, you get to meet some nice people that way.
Are you seeing a counsellor regularly? It can be good talking to someone who isn't a friend or relative. You don't have to be brave, or positive. You can let it all out and cry.
Hoping you find the new normal. Best wishes Karen xxx