Well... I really don't know anything about this.

But I noticed no one had replied to your post. So I thought I would.
I'm 70 years old.

My personal opinion is that, at some point, one just has to stop worrying about all of the stuff society tells us we should be doing. It's just not worth the time, the expense, or the effort in my opinion.

I'm not a mental health professional. So I don't know why you experiencing the ADHD & bipolar problems you mentioned. One thing I do believe is that the older one gets the easier it becomes for one's nerves to become frayed. At least that has certainly been the case for me.
You mentioned you moved to a new state about a year ago & began seeing a new pdoc. And, along with this it sounds as though you've had a bunch of different med changes. Plus you have all of this weight-related stuff going on. So my personal, non-professional thought would be that perhaps what is going on here has as much to do with anxiety as anything else. And it is a heightened level of anxiety that is causing you to feel like your ADHD & bipolar symptoms are ramping up.
I don't know if there is much of anything in particular I can suggest in the way of coping skills until you get a new psych. From what you wrote, it sounds as though you're doing a lot of things right... walking on the tread mill, walking your dog, etc. Of course, meditation is something that is often recommended. But, at least from my perspective, that is a long-term, not a short-term, solution. Journaling is something that I have also seen recommended for both depression & anxiety. But, there again, I suspect that is more of a long-term rather than a short-term strategy. I don't know if you see a therapist. Having an opportunity to talk all of this through with someone might help, if you're not already doing so. I guess my personal prejudice just suggests to me that at age 64 (which it sounds like you are) you simply have to find a way to start letting some of what you're obsessing about go.
Here are links to 7 articles, from PsychCentral's archives, that perhaps can be of some help:
9 Ways to Reduce Anxiety Right Here, Right Now
15 Small Steps You Can Take Today to Improve Anxiety Symptoms
Top 10 Lesser-Known Self-Help Strategies for Anxiety
How Meditation Helps Anxiety
20 Tips to Tame Your Stress
https://blogs.psychcentral.com/imper...s-and-anxiety/
https://psychcentral.com/blog/using-...o-reclaim-joy/
My best wishes to you...