Sixteen-year-old Haidyn Ulrich is many things. She’s an avid Iowa Hawkeyes fan, a performer, a top student, an aspiring nurse, and a survivor of pediatric cancer. Haidyn had been healthy until she was 7, when she experienced neck pain and began sleeping for 22 hours at a time. Numerous tests finally led to a diagnosis of acute lymphoblastic leukemia – a cancer of the blood and bone marrow – and…