HSC Prep Crisis :))

So, my HSC is almost here. I've been giving model test exams at Udvash, and I'm kind of frustrated with my results. In every single exam I've taken so far, I haven't scored above or at least 50 out of 55 (been scoring 40-45 in CQ and MCQ combined) and I'm getting worried. As an engineering aspirant, if I'm not able to score decent marks in the HSC, I won’t even be able to sit for the BUET admission test.

The main reason behind my frustration is that I’ve covered around 80%+ of the syllabus during my 2nd year. However, in MCQs, I’m getting lower marks than some of my friends who aren’t as strong in concepts or even close to my level.

What are some things that could help me improve and how should I prepare from now on?