Hi.. :)
I can understand your state right now..But Don't be sad..
Sometimes its our state of mind which goof up everything no matter how hard we study..
But, If you're really keen on going to DSE, ISI, JNU then, study more harder this year.. Try to learn from the mistakes you did in DSE, ISI this year.. Furnish them. Learn more..solve more problems.. Try some advanced level online courses.. Increase your knowledge.. Be relaxed.. And maintain cool state of mind next year while giving the exam..
Am sure next year you'll definitely get through wherever you would want.. :)
And abhi JNU result is not out yet.. You might get through there.. :)
:)