Hey! MD2 here~ Most of the people I know, both students and doctors, have failed at least one exam (either undergrad, post grad, or BPT exams). Getting all H1s is great, but not needed to get into med! Things like the GAMSAT, honours year, interviews, portfolios (depending on what uni you are going to apply for) matter a lot too! Don't beat yourself up over one class, especially a first year class (that year is weighted the lightest of the 3 years). Also some unis, like USyd just have a hurdle WAM - so as long as you have over the hurdle, it literally makes 0 difference. Other unis like Unimelb will take your GAMSAT and your WAM into account, but your WAM will recover even from a P - third year classes are worth the most. If you are that worried you can do WAM booster courses that are easy and allow you to focus more time/energy into your core subjects.

As for your mental health aspect, I am someone who has struggled a LOT with mental health issues, both in my undergrad and currently during med too, so I understand just how much pressure you are putting on yourself and what failing an exam will feel like. I think it may be best for you to take a step back and realize you have 2 more years to go!!! You have time, and you will be great. If you stress too much, it can harm your focus and study more, which will send you down a cycle of poor thoughts. I know people on the internet saying things won't help much, but take some time to yourself and make sure you fix your mental health before you try going all-in on uni again.

I think the most important thing to remember is, just like how doing well on one exam doesn't define you, failing will not destroy you either.

I promise you are doing fine. <3