Why didn anyone know Heather was so sick?
Until a few days before her death, Heather had been symptom-free for more than 6 months since her previous illness was diagnosed and treated, and even though she had experienced discomfort due to her prior intestinal troubles, the sudden illness that caused her death was an entirely new condition with signs and symptoms that neither she, nor her family, were familiar with. The Friday before her death, she began to feel slightly ill, and mentioned it to her sister who believes that even though Heather seldom complained about feeling sick, she would not have held back if she really were. It is possible that no one (including Heather herself) recognized the seriousness of her condition until it was too late.