Answer:
The symptoms shown by Emily are frequent headaches, nausea, light sensitivity, and vomiting. The etiology of the condition is Iatrogenic that is, caused due to the interactions of drugs or treatment and the combination of lifestyle.
The symptoms are showing the side-effects of birth controls, however, the risks enhance due to smoking as nicotine leads to high blood pressure and an enhanced heart rate, this imparts additional stress on the blood vessels.
Emily is suffering from an acute iatrogenic condition resulting due to her smoking habits and interactions of drugs. She is suggested to stop smoking and to see it this relieves her headaches, nausea, and light sensitivity. For further diagnosis, the health care professional or the physician should examine her blood pressure and ask for her family history on heart issues or stroke cases.