Reapplying to LSE 2026 admission cycle - HELP

I got an offer for LSE law LLB for the 2025 admission cycle but seeing how my exams are currently going I feel like I wont get the A*AA admission grades I need to get into the course and as much as I want to believe I'm just being paranoid, every time I go over the answers I put on my exam paper I just feel worse knowing I definitely got it wrong (yes I looked over the specification and past paper mark schemes and my answers don't fit in with a lot of them) and lost out on a lot of marks.
So just in case I don't end up getting the grades, does anyone know if LSE is less likely to accept you if you reapply, since its literally my dream university and I put in so much work to even get an offer after being rejected by UCL and KCL . Of course i'll try my hardest now to get the A*AA grades so i wont have to do the LNAT and PS all over again or have to resit my a levels but if anyone who has been in my position can give me some advice on how to make the most of my exams now, or how to have higher chances of getting in if i have to reapply that would be amazing.