Wow, didn't know this was such a common thing... I was working on my CFI, got frustrated with my instructor for it because he was being a dick. I ended up getting an aerial survey job, and finished the CFI a year later. Even a year later hopping back into it was a pain. I ended up passing it on the first try and just got my first CFI gig.

there's a lot of knowledge to know but you wouldn't want to have a student ask you a question and just be dumbfounded. Good luck and just remember if the guy that sat next to you during your training did it, you can to.