Yes of course!!!
Us year 11’s have like 3 months left till our exams and I reckon with some active recall, blurting and identifying your mistakes in exam questions you can easily get a 7/8. Also, if possible try get your teacher or family member to mark your paper because if you mark it yourself you may be more lenient.
When I was doing class mocks for geography (AQA), I was getting 5’s and then 3 months later for my mock I got a 9! So it is possible and just FAKE IT TILL YOU MAKE IT!!!!
But anyways hope this helps and GOOD LUCK!
P.S - ANY TIPS FOR ENGLISH LIT OR CHEMISTRY