Hi Kayleen,
Finding a new normal is adjusting to a new way of doing and thinking about things and this takes time and acceptance... its not easy. I understand that not working would leave a huge void in your life. Have you thought about doing some mentor or voluntary work? Voluntary work can be really rewarding and you can find something that gives you pleasure around times that suit you. Voluntary work can also provide the social interaction that you miss when not working.
With regards to chemo mouth ... ugggg ... for me it was extra attention to brushing my teeth and using mouthwash three times a day. Fruit tingles began to irritate mouth ulcers so I changed to Extra sugar free gum which helped. I also found sucking on those frozen ice sticks (omg, chemo brain, what are they called?) gave a bit of relief. Having said that, it was still .. ugggg! Hang in there, it will get better!
Susie x