I have a Godzilla sized exam to pass that will decide if I am going to year 7( according to British curriculum but grade 6 according to the amarican curriculum) I really need help. I am a quite bright student but my spellings handwriting and speed are terrible.(There might be wrong spelling in this too don't mind please) marks will be detected for wrong spellings and bad handwriting and what if i can't finish the paper I think I will fail because of that. I would break up into thousends of tiny pieces if I fail or got a C my parent would be soo sad they expect me to get As or worst Bs. I will die if I get anything below. Please help me, give some tips on how to improve my handwriting and spellings and speed and consentrate.

I have serious vision problem and my teachers say that is the reason behind my bad handwriting and slow speed but the computer checking my paper donsen"t know this so I really need help with all this.
And quick if possible