Colleges / Sixth Form application URGENT enquiry

Hi!
I’ve completed my year 11 mock exams and I haven’t done very well.
The colleges which I wish to go to all ask for high grades.
I have an excellent record of extracurriculars.
Is it possible that I send the college an email with my PS attached and ask them if they can look at my mock exam results which will take place in Feb/March instead?
Any help would be highly highly appreciated. Thank you.