I have no motivation to study? i want to give up VCE and return back home?

I am in year 12 victorian certificate of education VCE . past 9 weeks has been the toughest 9 weeks in my whole life . I ema more than one way it's disturbed my regular sleep . spending several sleepless nights thinking if i fail vce what would my parents think? I do miss the wonderful confort and support that i get back home . please should i give it up now or go for 6 more months and say i have given it my level the best.