If I were you, I would get a full hormone blood test done, incorporate some new stress management practices like daily meditation and consider some antiinflammatory additions to my diet like high EPA fish oil and/or CBD. In my experience, low carb certainly does show results also.

Even after all that, it's important to remember that everyone's body changes as it gets older, and to accept that you're doing the best that you can

Time to say goodbye to being young, there's no point in denying you're an old person now. Your body started failing you and it's going to get much worse. No energy, pain in random parts of your body. That's what being 35+ is.