OP back with an update, since a thread like this is useless without one.
Reporting back for the archive rather than for the thread: I did the narrow version of what was suggested, gave it the full interval, and it settled. Posting it because threads without a follow-up are half a thread.
stefan_berlin said:If you are going to change something, change one thing and give it long enough to express itself.
Agreed, and one caution: a single measurement is not a measurement. Anything that moves day to day needs a trend before it means anything at all.
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Shop Reference Standardsstefan_berlin said:If you are going to change something, change one thing and give it long enough to express itself.
Bookmarking. The distinction being drawn above is the one nobody else makes. Sending this to two other people who asked me the same thing last week.
Clinical perspective, offered as context rather than as advice. Start from the measurement rather than the conclusion. Almost every disagreement here turns out to be two people measuring different things and comparing the numbers anyway.