Is there still hope?
Thanks.
OF COURSE THERE'S STILL HOPE!
(sorry for caps but YEAH just because of a few meh sacs doesn't mean you won't get into med) Each sac is worth about less than 1% of your entire ATAR and it all comes down to the end of year exams.
As for the SAC scores, your ranking within your class is all that matters (In case this makes you feel better, I got 67% for my spesh sac which was worth 100% of unit 3 XD but ended up being rank 2 by 0.27%

)
Hmmm as for which to prioritise, I'd personally keep doing whatever you're doing (assuming you've been studying for both), don't neglect one for the other and instead
find a balance. You've got 1 and a half weeks of school holidays which is plenty of time to fit both of them in
I'd personally work harder in whichever I feel less confident in. Oh and make a study timetable

Block in sessions when you want to study for UMAT and for your SAC, and also don't forget to block in times where you just kick back and relax (so you can be fully refreshed for term 3
And also don't forget that there is no set ATAR for the med entry line, I know quite a few people who got into Med with medium 90s atar and similar percentile in their UMAT.
Nothing's stopping you in getting into Med except your faith in yourself
I BELIEVE IN YOU
now go study :}