Are 5 AP classes too much for Junior Year on top of ECs?

Three of the courses (AP English, AP calculus BC, and AP Spanish) are presumed next levels from previous honors courses, so should not be greatly more difficult than the previous level honors courses (but will have more advanced material). As a strong student in math (two grade levels ahead) and heritage speaker of Spanish, would these be your two easiest subjects?

One (AP US history) should be presumed to be harder than the regular version.

One (physics) is a typical science.

One (AP chemistry) is considered a hard course, but probably not unreasonably hard if you had chemistry before.

If you do want to reduce your workload, shifting US history down to regular or substituting some other academic course for AP chemistry (and perhaps moving that to next year) may be the most obvious choices.