Whenever I do anything that I'm scared of, or worried about, or just unsure if what I'm doing is correct, I always like to ask myself - what's the worst/best case scenario?
Well, if you don't go to your oral, what's the best case scenario? You get 0 for your oral. What's the worst case scenario if you do go? You get 0 for your oral. It's scary, sure, but the absolute WORST thing that can happen if you do go is already guaranteed to either be better than if you don't go, or the same as if you didn't go. But what if we looked at it the other way? Well, best case scenario if you do go - you surprise yourself with how well you actually do, and get a decent score. A lot of the oral is about attitude - if you psyche yourself out now, you won't do well. But if you try to swallow your fears and pump yourself up, you can still very well!
Okay, so what's the worst situation if you don't go? You get 0 for LOTE. Not just for the GA - but for the whole subject. I don't know what will exactly happen, but I do believe if you don't have a mark for each of your GAs, that counts as not having done the full subject, and so they don't give you a study score. Again, I don't know this for certain, but based on everything I do know - this is a possibility.
So yeah, it's scary now, but as Owlbird said - you get time to go through things. In my own experience, all my face-to-face examiners (I also did music in VCE as well as Jap SL) were lovely. Usually, they're teachers, and most teachers want you to do well. That's why they get into teaching - because they want students to be able to achieve. 100%, I get the nerves. 100%, knowing that it will be better in the future is never amazing motivation for how you feel now. But trust me and Owlbird in this case - if you just give this one solid push, it'll all be alright, and you'll be in an infinitely better position had you decided to just not show up. It's kinda like getting a vaccine - the needle is scary at first, but if you push through it, then that's one less disease you have to worry about.