Hello there,
This is the first time I've come to anything like this, either. I was diagnosed with rectal cancer last spring, and have gone thru all the treatments (inc. chemo/radiation, surgery, and now chemo again). I also am 48. This is my 2nd, independent, bout with cancer - I had breast CA 10 years ago,( this is not related to that). I completely understand the depression and efforts needed to stay positive. My son was 19 when I had breast ca, so I don't have the teen at home right now, which I know that puts a large added stress on you. I am single, so live alone - in some ways this is a blessing, in other ways quite difficult.
Here's the thing, we need to find our hope, our reason for pressing on thru the pain, the fatigue, the depression. My body is not my friend right now, it is unpredictable, embarassing, it leaks and has little control. I often don't want to leave the house, because I don't know where I might get stuck in a bathroom. I say this just to say I understand the horrors of this situation. My personal strength comes from the Lord, I don't know how I would get thru this time without Him. I don't live anywhere near you, I live in Washington state, but I can offer a listening ear, prayer, and empathy.
It will get better, this will one day be a part of our past. They say what doesn't kill you makes you stronger, seems like a terrible way to get stronger to me! But I think there is some truth in it. Sorry for your suffering. It is heartbreaking, but you have to believe that it is survivable. Constant pain & fatigue will get you down, I wish I had something to suggest, I hope that something is found to treat the pain soon, perhaps even has been by now.