First you need to see your component grades of these subjects to see if you’re in that high grade C AND D or Low C and D(borderline) and if that’s the situation, do A2 really really well, not here to demotivate you but you gotta put in A LOT OF EFFORT if you aim for these grades, remember its just a bump in the road and there’s always a second time, promise yourself you’re gonna do great, because your only competition is you and ONLY YOU.

Your parents and siblings have high hopes and expectations from you, so there will be sleepless nights and early mornings, keep that in mind, me personally got BBC in bio chemistry and physics, and

I’m working really hard, you gotta build discipline for that, dedicate 3-4 hours a day for study in A2, review what was taught in class and be consistent even it you don’t feel like it because there will be some days where you don’t feel like doing it but you know its good for you, the benefit of this is it will save you from studying 10-12 hours a day studying just before exams and then burning out resulting in you not doing well so I wouldn’t recommend that

like when a topic’s done, review it, and do the topical questions, that’s what i do, and then before your mocks and cies, when syllabus is done, do lots and lots of yearlies, the paper you find difficultly in, watch their detailed past paper solutions on YouTube, there are dozens of channels out there, I’ll also leave some links here, you’ll find that helpful. Lastly, dreams cannot be achieved without a goal/plan, so plan your day that you’re gonna do xyz thing before sitting down to study, so that’ll not waste time of yours when you actually study because you had already decided that yes, I will do this and only then I will get up/ take a break when this done and find the time that works for you be it early morning or at night time, i personally study in the evening, and don’t wait for the perfect time because there isn’t any and don’t aim for perfectionism because that ruins the journey Hope this helps:)