Mrs. Hernandez, a 67-year-old woman with congestive heart failure (CHF), has lived with her condition for several years. Initially diagnosed after a hospital stay for shortness of breath, she responded well to medication. Over time, her symptoms progressed, and she now experiences frequent fatigue and occasional hospital readmissions. Recently, her functional status has declined, and her family has begun providing daily care. She remains aware of her condition and actively participates in her treatment planning. Background: The Chronic Illness Trajectory Framework includes these 9 phases: Pretrajectory Trajectory Onset Stable Unstable Acute Crisis Comeback Downward Dying Which phase of the chronic illness trajectory was Mrs. Hernandez in when she was first diagnosed and began treatment?