Last minute revision CHEM + BIO AQA a lvls

Man I really screwed up by not revising at all during the holidays and now i've got my AQA bio p1 on Thursday.
I know all my content for topic 1-4 (5-8 is 50/50 esp topic 8) so i'm just currently blurting and practicing qs by topic on revisely.
I was feeling pretty confident till I did a paper for Bio P1 b4 revising and I didn't get a bad grade (around 67% - is that a B?) but i'm just so upset i'm losing silly marks, I wish I revised before but nothing I can do about that now.
However IT IS STRESSING ME OUT!

And chem is another problem, I have never revised chem as it was one of those subjects that I hated learning the content but once the content clicked, I always got qs correct. I went over A1 chem and A2 physical, just need to go over the later end of A2 organic and inorganic but idk why whenever I think of sitting a paper I get panicked and can't.

Are there any tips from ppl who revised their subjects last minute and got good grades?
I want 2 A's but idk it seems IMPOSSIBLE