admission Fall 2016

I am a current 12th Grade international student.My SAT score is 1950, Maths 1, 740 Maths 2,760 ,physics 710. I have applied to a few US universities and got rejected by some. A few more are yet to know but I lost my hope.I am preparing hard for IIT JEE too. I want an advice. Can I reapply for Fall 2016 after improving my SAT scores. Would the one year break affect my admission chances?
As I would be out of school by then who could be my admission counsellor?(now it is my class teacher)