What happens if you can't do A2 exams?

If a university has already accepted you, and you've sat your AS exams but aren't able to sit your A2 exams, what steps are taken?

I'm only asking as my mental health has been suffering intensely in the past couple of months, with my parents insisting on hospitalisation (bad history when I last declined). But I think that would look way worse than grades below my full potential, I did really well last year and all year through the mocks. I'm just so anxious that it'll all slip at the last minute, not only screwing up the exams but the image that'll present to the university. I'm applying for English Literature at Goldsmiths, so I've been assured that their focus will be on my English grade, but it all seems like a lose lose situation.

Inputs, please?

Edit: please excuse any (ironic) grammatical errors lol, panic state.

If a university has already accepted you, and you've sat your AS exams but aren't able to sit your A2 exams, what steps are taken?

I'm only asking as my mental health has been suffering intensely in the past couple of months, with my parents insisting on hospitalisation (bad history when I last declined). But I think that would look way worse than grades below my full potential, I did really well last year and all year through the mocks. I'm just so anxious that it'll all slip at the last minute, not only screwing up the exams but the image that'll present to the university. I'm applying for English Literature at Goldsmiths, so I've been assured that their focus will be on my English grade, but it all seems like a lose lose situation..

I am unclear whether the exam board would agree that this amounts to not being fit to take the practicals - and would welcome any comments to help us decide what to do.

Not knowing more details of the case I cannot advise - ultimately it is down to the exam board. You will have to take your school's advice.