How long should i take ashwagandha

Hi guys, i’ve been using ashwagandha for 2 weeks now, and i stopped and i feel a bit anxious, because i saw some guy on instagram talks about it and he says you should consume it for 2 weeks and take a break of 3 weeks.

But i read in this group that 8 weeks is okay? Is that true and can you give me advice how long should i take it and when to stop?