Lots of students seem to not do great in Honors physics then do great in AP physics. Think they are just better in Calc. But you need the foundation. Talk to your teacher and get some study guides for the summer. Use Kahn academy and see if you can learn some of the concepts this summer better. Talk to your teacher for AP physics and see if you can get the syllabus early. Look it up anyway in Kahn Academy or the like. Go to your teacher for help day 1. Tell them (if not the same teacher) what happened and what your goals are. Teachers actually love helping students that want to help themselves.
Also have safety engineering schools since getting into any one school is hard. Cast a wide net anyway. But usually one grade won’t deter schools from accepting you.
If your goal is to become an engineer you will be fine. Many many fine schools out there.