You have to have the foundations down like the back of your hand because when the exam comes the writers will pull out every trick and all you can do is rely on your foundational training under the timed pressure. Now, that doesn't mean you should just memorize the lectures on 7Sage; rather, I'd recommend doing practice problems along with the lectures to better ingrain the concepts.

Retake. A 160 would put you into serious scholarship range for those schools. I'm also in the area you can DM me if you want to put in some work together.