About IITs and JEE
well if u take admission in any of the IIT's , u are not eligible to give the exam again
however if u take a full drop or take admission in any other clg , u are allowed to write JEE
but (as i did the same...) i wont suggest u to go for a full drop , take admission in IIT as u are not sure what will happen next time , even if u prepare with full dedication , u still might ntget selected
and with a rank of 2k , u will get a very good branch in new IIT's
all the best..