hello pal...
I have a little more than two weeks... but let me help or atleast try to help
the score on ur test is a big boost..keep it mind always and keep ur spiritz high...
Now U better schedule ur remaining tests according to ur own way...get in touch with ur basics brush them...analyse ur tests and see wer U have gone wrong...and see how U can better ur testing skills on the next practice ...
SC: the only way is have some fundamental touch of the English Grammer... after that U need to have some instinct ..I say the sentence grammer instinct... always watch out for the 'weak' link in ur Sc ...I mean see wer U severe the Sc because it is the weak area... check out in the pronoun, subject- verb ,Idiom , parallel , comparision , modifier, redundancy angle...
do the /3 elimination process...
O yeah keep ur heart calm and Gmat is not the LIFE not even a GOAL not even a secondary GOAL...but just a means to the GOAL...
but yeah whether it is GOAL OR MEANS TO GOAL U have to beat it and there is no compromise...
let me know if anything else...
Have Fun

Good luck !