Gotcha! Well, now there's only room for improvement. Good on your for realizing that.
I always highly recommend the Destroyer materials. I used the General Destroyer + Math Destroyer (and associated Orgoman YouTube videos) + Dynamite Bio Notes exclusively for everything but RC and PAT, and it ended up pretty well I'd say. If you're weaker in GC or OC, I've heard great things about the OC Odyssey and GC Destroyers as well. Just remember, it's always better to over-prepare for the worst than to under-prepare and suffer on test day.
Know these books well enough, and you're destined to get a pretty good score.