I'm extremely stressed! Any advice?

I just finished my first week of junior year and am already stressed out. Before you say anything, I'm not dropping classes.
Anyway, I'm taking AP US History, AP English language and Composition, and AP Physics as my AP classes. I expected history to be a very high pressure class, but my problem is that I was originally supposed to take AP Chemistry, but had to drop it for AP Physics (the only other AP science available). Now I already did the summer homework for AP Chemistry and I am now super behind in physics and have to catch up on a ton of homework that I only have a few weeks to do, whereas this homework took people the whole summer to do, in addition to the homework given in class. On top of this, I have to do a chapter of history a week (not that bad) and take notes and study for a quiz, and I get at least 20 problems for precalculus a night. Normally I would try to space this all out, but my physics homework (with reading and trying to catch up) takes about 3 hours of my day, so around the time I finish, it's already 7-8 o'clock, depending on when I get home. History takes another 1-2 hours (I have to read every night to get through the chapters) and math takes up another 1-2+ hours(I'm not that great at math, so I have to take a really long time). How can I deal with the stress? I already have a caffeine dependency, which doesn't help. I need some advice. I love my classes, but they are stressful and high pressure. I had to drop chem to take asl.

Teo2014-08-23T22:14:10Z

Hi I not from your country, but during my younger days I will often approach my teacher after class for consultation. People like me are slow learners and consultation a the best place to clear all ur doubts and gain confidence.
I think stress is just a option, it is just how u think and how u want it to be. Just find the purpose of studying, is it to get good grades so u can choose the course u want in university or the job u wanted?
if u know the purpose u will understand that what u are doing is just building up ur knowledge and learning capability which is important for workplace. once u have the purpose its more like a learning journey than a stressful path cus u are forced to do it.