Dear Sally,
I am sorry to hear that you have a fever and fail the test. First,you should drink lots of water and have a good rest.It's good for you heath.If you still feel unfortable,you should go to see a doctor.As for study,dn't be sad.Failure is the mother of success.
You shuold work hard .You could also ask your teachers for help if necessary.
I hope you will feel better soon and get good greads.
Yours
Jill