A client with a positive pregnancy test presents to the emer…

A client with а pоsitive pregnаncy test presents tо the emergency depаrtment repоrting lower abdominal pain and light vaginal spotting. The nurse reviews the following assessment findings. Nurses' Notes Time Assessment Findings 0900 Reports left lower quadrant pain rated 5/10. Small amount of dark vaginal spotting. Alert and oriented. 1000 Reports increasing abdominal pain rated 8/10. States, "I feel pressure in my rectum." 1030 Reports sudden onset of severe shoulder pain and dizziness when standing. Appears anxious and pale. Vital Signs Time BP HR RR SpO₂ 0900 118/74 84 18 99% 1000 106/68 98 20 99% 1030 88/50 126 24 98% Laboratory Results Test Result β-hCG 4,500 mIU/mL Hemoglobin 11.7 g/dL Hematocrit 35% The nurse should immediately notify the healthcare provider based on which assessment finding?