Maybe you could apply for a derived examination score? I know a friend of mine who got a concussion a month or two before the exam period and he was able to apply to apply for a derived examination score using his GAT results
But yeah if you can, definitely take the GAT very seriously I guess
I didn't really do anything during the first term of Biology, as I figured it would be my 7th subject, and therefore it wouldn't count towards my atar, so I hardly even showed up for class, and when I did, I just zoned out of it completely or messed around with a couple of mates
but yeah over last year's easter break (the one we're on now) I was just reading through some of the chapters and I found it kind of interesting, and just in case I choked on one of my other subjects, I thought it would be a good idea to actually do well in Biology. So yeah I pretty much just read all of the unit 3 chapters in my textbook, watched youtube vids etc etc and learnt all of the content during the term break (the teacher had finished the whole unit before the term ended) and in the end I got a mid-high A+
And it wasn't like I was doing 5 hours of biol a day from the start of the holidays to the exam period, I had plenty of time to chill and worry about my other subjects
And I crammed heaps for my chem mid-year as well, like I did my first practice exam a week before the actual exam, but I still ended up with a low A+
You have plenty of time to catch up and even get ahead of the state, just don't waste it. Actually pick up that textbook and start studying now. You may be behind most people in the state at the moment, but there are a lot of drop kicks out there so don't get too stressed
also don't let being behind discourage you at all, use it to motivate you
plus you have the special consideration stuff on your side, chill bruv