Midyear report

I am a senior and am currently sending out my midyear report. Prior to this year I had all As except freshman year when I had 3 Bs. Unfortunately I had some circumstances that affected my grades and my midyear report has a lot of low grades. How much will this affect my chances at Ivies, MIT, Barnard, JHU, CMU?
(My school does 90- A and 80- B)
First quarter:

Ap bio 83
Ap calc 83
Ap lit 86
Ap gov 90
Jrotc 91
Financial lit 96
Health 100

Ap bio 80
Ap calc 87
Ap gov 86
Ap lit 90
Jrotc 94
Financial lit 95
Health 100
*my guidance counselor might be able to attach a note explaining my circumstances, i don’t know if that is of any help.

Yes have your counselor write a note regarding your circumstances.

Unless your GC can explain the issue fully and impress its importance, the B’s are going to hurt your RD schools