Times a thousand. I’m older and have beat the shit out of my body with drugs (ended early 20s) and alcohol (still) and don’t get enough exercise and I wake up feeling reasonably good. What has been described here is outside of normal aging. Good luck!
Also, give up on that doctor. Reminds me of one that assumed I had a hemorrhoid without checking it and I actually had an abscess of infection. Emergency room doc told me that had I waited any longer for a second opinion I’d have had to get checked in to deal with it. Your current doctor is dangerously unqualified.