Resitting exams as someone with a back injury

i was wondering how unis felt about resits? i did a couple of quick searches but i also wanted some personal advice. i had a serious back injury last summer that caused me to miss a couple of month’s worth of school but i decided to sit my exams this year anyway since i had 3 A*s predicted and i could probably catch up. i regret that decision now. my back can’t stand the stress of exams and i’ve had to take my movement break 8 times in each of my exams. i completely flopped my first further maths paper because my mind and hands just froze from the back pain and i haven’t even felt like this during mocks. i’m not sure who to talk to about this and i seriously think i’ll be needing to resit. should i email my firm (UCL) about this or? i guess i need to wait until results day but i’d like to have an idea.
do universities not like resits? and how do they work in the terms that will the university be told a predicted grade for the exam i am resitting? and could i apply to other universities again as well? such as oxford since i didn’t do well due to lack of prep due to my back injury and being subjected to months of bed rest right up until mid october with a back brace and not being able to sit in class.
to be honest, i feel ashamed and like i’m making excuses that i wasn’t able able to make a better situation out of my back if that makes sense.
should i contact the exam board about the back pain or does it even count as extenuating circumstances? i feel like my school doesn’t really care so i’ve come on here for some advice.
and anyone who is resitting, could i get some general advice on it?
for some general information. i was already considering doing a gap year and reapplying to oxford as i wasn’t able to sit the PAT to the best of my ability due to my back injury. i know they only accept resits for extenuating circumstances that were unavoidable but i’m not sure i’d count. and my alevels are further maths, maths and physics + epq.
i should probably add that the back injury in question is me falling 6 metres onto my back in july which i then had to be hospitalised for without being allowed to move for the whole week and a half i was there. i was supposed to stay longer as they needed time to assess whether i’d need surgery but i wasn’t from that city (london) so i was transported back. i was then on bed rest and if i needed to move i needed a back brace. i had to get a new mattress, needed help with doing daily tasks such as showering and could definitely not study until at least october properly as i could not even sit down. i’m doing much better now nearly a year later but it affected me mentally and physically as i have perpetual pain now and i have physiotherapy.
any advice would be gladly appreciated!

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