Answer:
Variant (Prinzmetal's angina)
Explanation:
Prinzmetal's Angina, also called Variable Angina is a syndrome characterized by episodes of ischemic pain that occur at rest (during sleep and more often in the early hours of the morning, as with Harvey). This syndrome is caused by a coronary vasospasm (temporary narrowing of a vessel). Treatment is with ingestion of nitrates and calcium channel blockers.
Menstruation? Idk if that is right, but it sounds like someone started their period.
Yellow fever is an acute viral haemorrhagic disease transmitted by infected mosquitoes. The "yellow" in the name refers to the jaundice that affects some patients.