Are my grades good enough for ivy league, particularly dartmouth or columbia?

My dream is to be able to go to an ivy league. I have now a 3.91 ulative just finished 1st semester junior year. You see, I had a 3.96 before but PHAILED this semster cuz I got a B in a super hard lit cl Honors and a B in ap econ. I'm in 3 ap's and 2 honors. See, i dont regret taking the lit cl cuz it really raised my reading standardized test scores for sat and act, even though i got a B, it was totally worth it. But I had an A- in ap econ all along. Exept, i phailed the last 2 tests and the last test I got a C and it was like 1/5 of our grade cuz of the hefty amount of points. TO top it off, i left homewokr at home and got a zero on that so in the last month of the semester i went from an A- to a B. But next semester, i'm gonna not forget homework and study Hard for tests. Basically our speed was too slow before so at the last month we did like 7 chapters and it was phast! But next semester i'm not in yhonors lit cuz it was only 1 semester and so I can get a 3.95-4.0 but i'm worrried that I got 2 B's in one semester Junior year so i'm worrried ivy leauge won't like that. If I get a 4.0 next semester and do well get 5's on all my ap exams, I took 1 last year and i'm gonna take 5 exams this year and i have good community service and extracurriculars and leadership, then I get a 33 on act and a 2250 on SAT is there hope for the ivy leauge? (not harvard cuz i know i can't get in, but say dartmouth or columbia? or is my gpa too low because I got 2 B's all in one semester? See i'm gonna get a 5 on the ap micro and ap macro 1st semester was micro, and if i have an above-average essay, can I get into columbia or dartmouth? agian now my gpa is only 3.91 but if i get a 4.0 next semester I can get a 3.93 by the time i apply. is this good enough? a 3.93?