Am I doing more harm than good when I'm getting involved in school?

I'm in High School and I'm taking college cles. I'm involved in Tennis and Badminton, while attending numerous clubs. Volunteering is also coming up sooner or later. I feel like I have to do all of this to get into a decent college. I get home and I fall asleep straight away and have trouble finishing homework. I guess I'm stressed but who isn't when in High School? Is all of this involvement doing more harm than good?