No problem! It’s my pleasure 
Congrats on the perfect grades and scores! I totally know where you’re coming from and felt the exact same way after my sophomore year, but it honestly doesn’t work that way. Remember, you’re now a year older, smarter and more experienced. If we were talking about taking 1 AP vs 3 AP’s at the beginning of your sophomore year, then we’d have a different case. But now that you’ve taken an AP and have had experience, you’re in a more capable position academically. It’s sort of like building up tolerance. I took 3 IB’s my sophomore year and then 7 my junior year. Yes, junior year was rough but I was a lot smarter and narrowed down my extracurriculars to help.
The way I see it you’re honestly very smart and I think many colleges will open their doors for you. Especially given that your teacher says you’re ready for APUSH, I’d say take it! Also, think about it, if you take APUSH you will have literally taken the most challenging course load possible. You can’t control Spanish and Math because they’re level-based, but if US History and APUSH have the same course prerequisite, then you might as well opt for the latter. Whether you have the most challenging course load is based on one class, which you’re ready for.
Now, of course, it still will be very difficult. In order to breathe and have some free time, you’ll need to take other steps as well. Figure out better, and more efficient, study habits. For example, in sophomore year, I’d do every reading intricately; in junior year, however, I learned that it’s sometimes okay to skim and make tradeoffs, especially when certain assignments are not graded. Learn to memorize concepts faster by using flashcards, extemporize English presentations instead of memorizing word-for-word, etc. There are always tactics you can take and distractions/ useless activities you can eliminate to have more breathing time.
Lastly, you’re not burned out. Don’t say that. You’re way too young to feel that way and I think you feel that way because you just felt overwhelmed with work last year. Use tips I explained in the previous paragraph, reach out to teachers, or you can even DM me if you have questions to improve study habits. You are very smart and are going to do amazingly! You’re literally a perfect student so far – you’re more than ready.