Yes that seems like a good idea to me…we see stories here on CC where students get to far ahead of themselves in Math and then wonder what to do. Getting to BC is still very advanced!
ALso remember: It is okay to wait to take College classes in College! And if you are very capable in Math, then it is okay to pursue those in HS.
HS should be a time to learn and explore, not to be totally stressed out. You want to challenge yourself, but not to the point you are miserable.