Tests suck

So I have studied my ass off for the network plus the last few months. Did professor messer videos, read the Mike Meyers book, did Jason Dion udemy courses and then did practice tests on exam compass for free. I've been getting really good scores on all the end of chapter practice quizzes. Like 8 or 9 out of 10 every time if not a perfect score. Just took a practice exam from Jason Dion and I got a 65%. Bummed out, I reviewed my answers and half the ones I got wrong had answers that I was going to choose in the first place. I feel like I've studied as much as I can but still doubt my answers all the time. Anybody have other study methods I can use for free or cheap?