There's nothing to do but just loo ahead and focus what's in the immediate future!
As much as we would like to, we can't change our past. No point playing the numbers game now, or even thinking about your SACs, it'll only make you more stressed.
We can't change our past, but we most certainly can change our future. You've still got 4 subject's exams to go, which is worth a lot. Study hard for these next two week and it still will make a big difference in your score!
The peculiar thing about exams is confidence. If you feel confident about your upcoming exams, chances are your performance also improves
It doesn't matter if you don't feel 100%, but for the sake of the exams, get your confidence up and have faith in your abilities. I want you to walk into the exam room and show VCAA what you've got. No matter what they throw at you, you're gonna put up a good fight. You've come this far now, and it's the final stretch.
Let go of your worries and just look ahead, don't look behind, look ahead at the finish line and go for it
As for worrying about your ATAR, I'm sure you've heard this before, but there are so many pathways in life that if you want to achieve something, nothing will stop you from getting it. Say you want to get into a certain uni, then just get into a lower-atar requiring course and then transfer, if you will put in the effort into reaching your goals.
Hope this helped
All the best for further tomorrow! Be confident and walk in with a smile
I believe in you