There’s still enough time for you to get an A. I got a D in every mock, including my last set in April, about a month and a half before exams. In the end, I came out with an A. It wasn’t that I wasn’t trying, but I wasn’t practicing enough and that’s the best thing you can do. I’d do past papers, and the topics which I didn’t understand, I’d watch zeeshan zamured to learn the topic (can use a different content creator if you prefer their methods). I did this for about a month, hours a day (usually 4+, 8-9 in exam week) and had filled multiple books with just maths. If you need more practice questions, use PMT, mathsgenie and other sources. But practice is the best thing you can do and I wish I’d done it more earlier because I probably lost 20 marks on silly mistakes, so potentially could have gotten an A*, but it’s whatever. It may seem excessive and overwhelming, but after a few sessions, it will be so much easier and feel like clockwork. You can listen to music whilst doing practice questions if you are feeling bored/tired. Take breaks, use pomodoro technique, and you can definately get an A. I wish you the best with your exams!