The stickies are here: About the T Replacement Category - #2 by KSman
And what you seek is explained there.
Nashtide provided the short story.
Do get private labs to see were this goes.
You need to also be checking:
CBC
hematocrit
Do not make well thought out dose changes, as you have learned.
It take a week for a dose change to resolve to final serum levels, so you cannot make short term gut instinct dose changes.