Wow, SkyRunner, that's amazing!
I know I'm not supposed to have favourite chapters, but this is it! By the end I was actually wiping tears from my eyes.
You are full to the brim with the very top quality you need to get an Oxford offer. TRUE GRIT.
Despite all the adversity you went through, being bedridden, all the pain (literally) and the rejection, and the overwork, you never gave up, did you?
You are the kind of candidate who loves their subject so much they can't stop themselves. Look at this quote:
"I do have a habit of just making documents about things I'm interested in"
And helping other students to share your passion. Brilliant.
Also it's very telling that your teacher was a massive source of support. My son needed to be great at literature to get in for German. He didn't get an A* for GCSE English literature, but in the sixth form, he had an amazing teacher who really believed in him. As a result, he got 100 UMS for one of the English literature AS level papers. Inspirational teachers are far more important than they think they are.
And then lady luck gave you a helping hand by steering you towards chemistry.
I will be adding some more resources for this chapter in a minute.
I hope Oxford is everything you dream it will be, SkyRunner.