kaz1961, be kinder to yourself. This is a big issue in your life so it is no wonder it has hit you hard.
I don't know how far along you are with treatments, but I am still feeling the effects of chemo and rads, and I completed rads back in March!
Everyone heals at their own rate, and it isn't just physical healing, but the mental stuff too. We are pretty much left to our own devices to sort out our life after all the treatments, and there are other issues that make it difficult too, such as financial problems, family concerns,etc.
It isn't a simple case of pick yourself up and get on with living, so much as do what you can each day to make life more fun, and slowly things will improve with your/our/my outlook and energy, so that life finds a new 'normal'.
We cannot change what might yet happen, but we can be positive about what is NOW, and do what we can to recover after this energy sapping treatment.
I too worry about the cancer returning.
I used to worry about getting cancer in the first place, but now I have dealt with that issue and I am fortunate to still be here. The experience has changed the way I look at things.
You are doing great but your body and spirit is tired. Allow yourself plenty of rest, and plan lots of things to look forward to.
If you can get up out of bed and go for a short walk, or do something slightly energising, you will feel so much brighter to face the day, and gain control of your life again.
Take care,
June22