A 28-year-old man presents to the emergency department with dark urine, jaundice, and fatigue that started two days ago. He reports a recent febrile illness, for which he took aspirin and an unknown antibiotic. He denies any history of liver disease, chronic anemia, or recent trauma. Vital signs: HR 98 bpm, BP 122/80 mmHg, RR 16, Temp 37°C. On examination: Mild scleral icterus and pallor, No hepatosplenomegaly, No signs of active bleeding. Laboratory findings: Hemoglobin: 8.5 g/Dl, Reticulocyte count: 7%, LDH: Elevated, Haptoglobin: Low. Peripheral blood smear: Bite cells, Heinz bodies and Blister cell. Direct Coombs test was negative. What is the most likely diagnosis?