Do you still remember your Year 8 results for every test/exam? What about your year 9 ones? If the answer is no (which it is for most people anyway), then you need to realize you probably will forget about your year 10 results as well and just focus on what matters; your 3/4's. Be pedantic as shit about them, but in the end most courses at good uni's don't need 99's anyway, so as nice as it is to get one just put everything into perspective and you won't stress so much.
In terms of year 10 subjects, and looking at what 3/4's your planning to do, try for Maths and go ahead of your course a bit; same with science and English. Everything else you really don't need to worry about at all - if you can get good grades, get them, but if you end up doing badly it really has NO EFFECT on anything in your life. Also, I don't get why you're doing Psych/P.E./Health 1/2 and not doing the 3/4 for them? A bit off topic but that seems like a waste of time?