Gentle observations: you mention feeling burnt out. Have you explored the idea of a gap year? I don’t know what this might do for you as an applicant.
I do wonder if getting Bs in your AP physics courses + applying test optional might have been a lot for schools to process in conjunction with your expressed desire to study astrophysics. I think having teacher references from your humanities teachers might further add to the confusion. Note: I’m not saying you shouldn’t study astro/physics – just saying that if I were an AO, that might raise an eyebrow.
I think, too, that applying to a really hard major that you love, even if it maybe doesn’t come as easy to you, AND committing to cox for a serious varsity program might be a lot to handle. Again, you’re challenging yourself in wonderfully authentic ways. I’d WANT to take a chance on you. I’d just worry (absent any test scores – e.g. AP tests or a strong quant showing on the SAT) that you might be biting off more than you could handle. I’d especially worry this if you weren’t coming from a school that sends a ton of kids my way.
If you’re super happy with your current options (and I think you should be! full tuition at Maine is fantastic, and Virginia Tech seems to be one of the happiest schools), maybe just stay the course and see where the chips fall. If you have a nagging feeling that you somehow left something on the table…or if your feelings of burnout are more significant than you mentioned…do consider the mental health benefits of doing something completely different for a year, whether or not you choose duing that year to reapply.