Laugh at the people who stress and say things like 'ill cry if i dont get .... '. Firstly stressing cant and wont change anything as you've already sat the exams and cant change it so no point worrying. And the 'Ill cry if i dont get a certian mark' people are just sad. The HSC shouldnt define your life and if you dont get the atar you want you can still get into the degree you want. The sole purpose of the HSC is to get people simply into uni or TAFE. So people if you get a ATAR lower than what you wanted but still get into your course seriously stop being so pathetic. If you get an ATAR lower than what you want then do another degree, be really focused at uni and get good grades so you can transfer into what you want.
So in short, no.
So in short, no.