Hello RainbowManFan: I see this is your first post here on PC. So... welcome to PsychCentral... from the Skeezyks! I hope you find the time you spend here to be of benefit.

It is certainly true that depression & anxiety can take a great toll on the body. I have lived with this for many years. I'm an older person now & I just have to force myself to get up & do what needs to be done every day. It's been that way for a long time. The good thing, in my case, is that I don't have to hold down a job. That makes a big difference.

You mentioned you're 40. This makes me wonder about the possibility of at least some of your exhaustion being caused by hormonal deficiencies. I don't know if you are male or female. But either way perhaps you have something going on hormonally that is contributing to your exhaustion. I know you said doctors don't understand. So I presume you've seen someone about this. However, I wonder if it might be worthwhile to consult an endocrinologist... someone who specializes in these sorts of problems. I know that sometimes doctors, who don't specialize in a particular area, aren't of much help when it comes to treating conditions they don't have much knowledge of or expertise in. Beyond that there are, of course, antidepressants you can try (assuming you haven't already done so.) I personally have never found them to be that beneficial. But some people do. Good luck!