You bring back old memories of when I was sick and I can relate to much of what you wrote (I am also 52). I don't know how long you went undiagnosed, but in my case, 5 years was way too long for me and I felt so lost as I KNEW something was very wrong and after seeing too many doctors who couldn't give me a diagnosis I was filled with despair.
That's when I took matters into my own hands and did my own research only to find out all my symptoms matched those of lyme disease and ehrlichiosis.
I must be a strange duck because when my blood work came back positive for lyme and ehrlichiosis, I was thrilled! No kidding. I think the worse part for me was not knowing what was wrong and once I did know, I fought hard to get better. Most of my journey was trial and error, I kept trying different treatment protocols until I found the one that worked for me.
And wow, did I learn! I remember when I first joined a lyme forum (not this one) and people talked about detoxing, I thought they were nuts. But after a while my curiousity got the better of me and I started detoxing (and still do).
So yes, I know that lost feeling.. I remember when I was a real workaholic and married where I would stay up past midnight cooking and cleaning only to get up at 6:00 in the morning every day to start the routine all over again.
I thought getting infected was a message to me to slow down and learn to appreciate life (the aspects of life that were passing me by). I learned about eating right (I used to eat so much junk food!). I learned about exercising and how important that is and still is.
So I feel for you..
I don't know what protocol you are on but I will say the same words I say to everyone, that after a certain amount of time whatever protocol you are on is not helping, then it's time to take a good look and see what else is out there. I think some get caught up in their protocol when it's not helping them for whatever reasons.
By the way, are you able to exercise? That helps so much.
You take care of yourself, it does get better!