Bad 1st Semester...Need Advice!

<p>Hello! I am a junior in high school, and we are nearing the end of our 1st semester. Throughout my high school career, I have maintained a 3.7+ GPA. This year; however, has been quite difficult for me. I have no idea why but this 1st semester has been a struggle for me. Reasons ranging from excused absences to stress to personal issues. Currently, my schedule consists of honors/AP classes and other notoriously difficult classes in my school. As of right now, I have 2 A's and the rest are B's/B-'s. For me this is unacceptable and I plan on working my rear off to get all A's next semester. I am involved in several in-school extracurriculars as well as a few outside of school. I'm also planning on volunteering at the local hospital soon. My dream schools are University of Notre Dame, University of Pennsylvania & Duke University (in that order.) I was just wondering if this drop in my grades will severely impact my chances of going to any of those schools? Thank you all so much in advance.</p>