Three AP’s your sophomore year is plenty. Calc BC is just a continuation of AB but more in-depth, at least at my son’s HS it’s that way. I wouldn’t say not taking Calc BC is a showstopper.
Talk to your counselor. At a high level map out your classes for the next 3 years just to get ideas. If it’s underwhelming then look for alternatives. Does your school allow students to take college classes? Are there any academic clubs that would interest you? Don’t underestimate EC’s and how they can help you grow. Life isn’t just academics.
Also, taking a little less intensive schedule your senior year isn’t a bad idea. You’ll be doing applications, writing essays, and visiting schools. Those take-up time.