I don’t know where you read that you should take oil of oregano for only 2 weeks, but you can take it as much as you want. I personally would limit its use to about 6-8 weeks if you are looking for maximum benefit.
I’ve been taking black walnut extract for the last 6 months or so and I am still taking it because it is still effective and its not for candida only, but parasites as well.
Only stop taking things if they seem to be no longer effective.
Caprylic acid is the only one that I know about that candida adapts to the easiest.