You’ve received some good advice above. The good news is you are DONE with main part of standardized testing and can focus on other things–especially pulling up your grades. The other good news is you are only a junior and have some time to think about your options, your goals, and how to position yourself.
Ask yourself what kind of school you want to attend. Small or large? Urban or rural? Do you want to pursue any ECs in college? What do you want to study? What makes you happy? What excites you? Read some college guidebooks to get a feel for different schools. Talk to lots of people. Read old threads here on CC. Maybe visit some more colleges between now and next summer. This self-inventory to help you identify your goals—and narrow your college list.
No need to apologize for being stuck. You are not stuck at all–you are only a junior! You are starting earlier than most kids. It’s great you are thinking about this with an open mind months before you really buckle down on application process.
Once you have a rough list of schools, think about what it takes to get admitted. Your application strategy will be entirely different for (just to pick three random examples) the University of Minnesota vs. Carleton vs. Stanford. You can probably get into some schools purely based on test scores and GPA. Other reach schools will want to see something more. The higher the selectivity, the more strategic and unique you have to be.
Now is the time to think about how you want to sculpt the remainder of your high school experience. Consider your application from the point of view of an admissions officer who sees thousands of applications with similar demographic profiles (suburban white kid, good tests, etc). What’s unique about you? Being memorable doesn’t necessarily mean you have to have won an international medal and doesn’t necessarily mean you need an incredible life story of being born in a refugee camp, walking across a war-torn desert, crossing the ocean in a raft , landing in the US and then immediately founding a startup that you sell for $1 million. Rather, it could just be having a uniquely perceptive outlook on ordinary experience—the sign of an active mind—as shown in your essays. Think about how you want to shape the second half of high school. Do you want to do anything differently to maximize “wow” factor of your extracurriculars? You could really focus on some of your ECs—working to place highly at state mock trial tournament, state science competition, or whatever. Or are you happy continuing what you already do? Only you can decide.
Most importantly, work hard to pull up that GPA, which seems out of whack compared to your high ACT. You may want to take SAT subject tests in the spring, depending on your target schools. Some selective colleges will expect them. Some great schools won’t demand them at all. Given your performance on ACT you could probably do very well, especially if you prepare for them, and that can only help.
Good luck!