i really dont see that its worth it. At the cost of physical stress, just go for it. wait until you really get into really stressful working environments. Like collge/uni for example, those are torture, also working under stressful bosses. high school has nothing on these. For you highschool should be the easiest form of education(aside from kindergarten) but still.
As for getting up early, i have some personal advice, GROW UP AND GET TO BED EARLIER!!!, i had this problem all through highschool and college and i regret it XD. though you';; have to be a genius like me to fly through all your tests