Good luck with your BO regime, hopefully I am wrong but do be mindful that you may not see much change in 3-weeks.
Ideally it needs to be longer say upwards of 3-months and more, also I would suggest starting off on a low dose (1xcap/day) then ramp it up weekly and do listen to your body, just in case there are any unwanted side effects.
The problem with glandular is that no one really knows how it works and why some have great success with it whilst others have none, there is very scarce research on glandular which is a real bummer.
I'm on HRT and supplementing it with BO with PGL and for me it only seems to make any difference once I got up to BO 6xcaps(1500mg)/day & PGL 2xcaps(160mg)/day.
At the same time I had a rise in blood pressure, but cannot be for sure it was the BO, so to reiterate, make sure you listen to your body.
Have a great journey and do keep us all posted