I'm getting raped as a junior with 4 APs: Calc BC, Bio, US, and Phys. BC and Bio are the two hardest classes at my school. So, definitely shouldn't have done what you did. Next year I'm taking double early and only 2 APs(the ones that are considered jokes at our school) so I'll get out of school at 2:30. That's the smart way to do senior year.