Bad senior quarter grades-- Brown ED chances?

I’m applying to Brown ED next week (I hope-- I’m gonna take advice from this thread into account) and the quarter just finished on Friday-- unfortunately, I totally screwed the pooch on this quarter’s grades. My school doesn’t really put a lot of emphasis on the quarter, it’s not reported on official transcripts for year-long courses, but it still exists (really as more of a progress report)-- which sucks because I didn’t have any midterms or anything to give me the chance to bump my grades up a bit.

My quarter grades are:
Reg. Government A (required senior class)
AP Lit A-

Creative Writing A+
AP Calc AB C+ (I was so close, right on the cusp) (a calc pun, to numb my pain)
AP Spanish B
AS Physics C+ (weighted the same as an AP class)

I’m honestly really disappointed in my grades because they don’t reflect my potential as a student at Brown-- I don’t really have senioritis, and my grade trend is way downward in my two math-based classes because they’re literally the hardest classes I’ve ever taken in my life and I don’t have a math brain at all (and obviously I don’t intend to take hardcore math classes in college-- but my EQ of a human analysis brain would totally thrive in those types of classes).

Would it be better for me to wait until I have slightly more presentable grades (ie NO CS) at the end of the semester and apply RD, or should I still try to apply ED? It really is my dream school. I participated in their most selective environmental leadership lab program this summer, and I’m getting a really, really outstanding recommendation from a woman who helps head the coordination of all the BELL programs and is an alumni and a full-time employee at Brown. I want to show how whole-heartedly dedicated to this school I am, but I also don’t want them to look at me like a pile of last-week’s underwhelming dog food because of my trash senior quarter grades.

help???

(note: I’ve got a W 4.14 UW 3.9, ACT 32, great continuity in diverse extracurriculars that all still build a specific character for myself, a strong essay + supplements, strong recommendations, and I’m a queer latina)

I’m in the same boat while applying early action to yale. I’m getting my first b on a quarter grade, I’m trying not to think too much about it and I’m pretty sure you could explain yourself in additional details. My counselor told me that a b is petty to explain, so I’m not going to go into details of my excuse but maybe your 2 c’s should be explained (if you have a valid excuse)? I would talk to your counselor.

ahh the stress is real-- good luck! yea I’m gonna talk to my counselor, my dad was sick for a while this first quarter and since my parents are divorced I had to make a long commute to go help him out sometimes during the week idk if that’s a valid explanation in addition to how crazy stupid hard these math classes are but… Idk I’m the worst but thanks so much for replying

this is probably a dumb question but will they actually see your quarter grades? since you mentioned that they don’t go on your official transcript.