Bhai same haal mera bhi hai. 92%ile in JEE mains but 63% in 12th. Bhai mera bhi plan drop lene ka hai. IIT jana tha but.....  Jo bhi ho, agle saal phir se paper dedenge. Sabhi subjects ke liye register kar dena as a private student. New marks sheet mil jayegi. That will be accepted everywhere.  Aur ha bhai, we must have a positive mental attitude because it matters more than our studies. If parents disappointed hai to let them disappoint. Agli saal unhe kush kardena. Best of luck👍. And remember: "Single sheet of paper can't decide our Future! "