Many great suggestions here.
As with any other medical situation, if the problem can be identified as well as triggers, then your battle is half over.
Meds may be necessary longterm, possibly only shortterm or even intermittently as the need arises.
The other suggestions for physical activity, diet, quite possibly supplements, work and home environments, are all valid.
As we know that our brain creates bridges from repetition, cognitive dissonance may impede quick repair of those bridges.
Personally, the last time that I talked to elders about meeting attendance and field service, and don't you always feel better afterwards, and I said No, I often feel worse, knowing that I cannot live up to what I and my family are being told that we are supposed to be doing.