Hi alib43
Systemic tesosterone levels fall fairly quickly - within a few days i think, as i recall, but some of the effects can take weeks or even months to alter due to cellular and other effects on bodily functions. After all I was told it can take up to 5 months to fully notice the difference when you start so it stands to reason that it can take some time also to reverese the changes.
However some changes may be more noticeable more quickly than others. Unfortunately I don't think there is sufficient research on this. If that is the only change you have made in the last two weeks then sounds like it could be but there are other factors eg diet and exercise as well. Also where are you in peri and what stage in your cycle are you?
I presume you are also taking oestrogen and a progestogen? It could also be down to changes in oestrogen levels if you are peri still? How much testosterone were you using and what brand?
That's probably not much help is it?! Anyway hope the aches and pains ease soon.
Hurdity x