Im shit scared what the hell do I do

Listen, im good to go for all the subjects, infact I'm good at science too but im shit scared, i havent done any sample papers for science, whereas all my friends have done it, ive only done pyqs for chemistry and in physics ive done a lot of numericals but when i say im shit scared i mean it. Im having major FOMO, people have done sm whereas i feel so belittled, only 2 weeks something are left and all'o'dat shit but i have no idea how I'm gonna do all of this, I have been sleeping at 4-4:30 for the past 1 week and i think itll only get worse each passing day until my exams arrive. Im fucking scared, my mother keeps lecturing me about how she wants me to score 96% or more. I got a 95.6% in my pb 1, i skipped pb 2 just so I could revise my shit (my fkin school has the pb 2 until 8 february)
is there anyone who did not solve spqs and only did pyqs (questions) and scored good, Or should I utilize my time and solve them anyways, cuz i still got 14-15 days