tmua jan

I have tmua on 9th jan for ucl economics and imperial efds
is it fine if I do bad in my mocks because obviously tmua was my biggest priority for the last 3 weeks and will be for next 10 days too as 2 of my choices (top choices as well) depend almost entirely on it. Then I have 4/5 months to revise for my actual a levels.

I am conformably scoring 13/14 out of 20 in the papers but also sometimes lower. Can I improve this in the next 10 days? How, and what should I aim for and how to prepare best. I've been told that if I score 15 or higher that puts me in a strong stead to definitely get interview calls for imperial. I have rlly good other stats like 10 x 9s at GCSE and A*A*A*A predicted at A-level + a strong personal statement.

I am really worried that I have been complacent and daydreaming, so not as efficient and effective as I should be in my revision. How do I stop feeling this way. Sometimes in the exam I check if I got the answer while doing the paper but I never change my original answer, just get where I went wrong. Is this bad?

Please can someone tell me what to think and how to approach this. How much more should I revise before my final TMUA or should I dedicate the rest of this week to lock in for a level mocks instead?