Cаse C:Actress Lupitа Nyоng’о hаs been preparing fоr her upcoming role in 355, but has had delays due to exacerbations of symptoms including severe pain in her chest, abdomen and bones. She has had these occurrences usually associated with demanding roles when she works long hours, the role requires physical exertion, and she gets dehydrated and hypoxic. The most likely diagnosis of Ms. Nyong’o is: