Sentence 1: Emily had been feeling bad for a few days. 
 Sentence 3: The doctor said she had a bacterial sinus infection and a UTI 
 Sentence 4:  Emily took her medication 
 Sentence 5:  She slowly but surely became well again 
 Option 1: On the sixth day, she worsened greatly. 
 Option 2: On the seventh day, she worsened greatly.