One thing that is still open after Dr.ReproEndo’s answer:

What did you change at the same time, and can you separate the two now?

VendorMark said:

One practical note: write down what you did and when, before you need it.

This is where I part company with the consensus forming above. I think the framing smuggles in the conclusion. Ask it the other way round and the obvious answer reverses, which usually means the question is doing the work.

VendorMark said:

One practical note: write down what you did and when, before you need it.

Agreed, and the size of the effect matters as much as its existence. Something real and small gets treated here as though it were real and decisive.

VendorMark said:

One practical note: write down what you did and when, before you need it.

This is exactly what I could not find anywhere else. Taking it to my next appointment.

From the other side of the consultation, briefly. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.