HELP!! How do I get permission to rewrite an exam!

[ps4overxbone]

dsage01 said:

ps4overxbone said:
but seriously you've already writen it and have seen the questions so i doubt u can you should of talked to your teacher befour writing it.. i've never heard of someone re writing an exam you show of reviewed

Even if they somehow prove they were medically unfit to do so? 

i mean you could try that you really have nothing to lose if you have a doctors note it's either a yes or a no but i think they will tell you that you should of said it befour the exame.