AP chem knowledge

Hi,

I teach honors chem and I just tried to take the AP chem MCQ and I honestly didn’t know how to answer most of it. I teach topics in honors that connect to AP and help prepare the students (for example net ionic equations, Hess’s law, IMFs, partial pressures, etc.) so I thought I would be able to understand most of the AP content but I was surprised.

I’m weirdly stressed that I lack that content knowledge. I don’t want to teach AP chem ever and my school has the position filled, but in a way I’m feeling like an impostor for not knowing AP level of my content area lol. It’s been so long since college too. Am I over stressing or is this ultimately important?