A 13-year-old female presents to the outpatient department (OPD) with on and off menorrhagia, bleeding gums, and petechial rashes. Her laboratory reports show the following results; Hb= 12.5 g/dl, platelet count= 350,000/mm3, activated partial thromboplastin time (aPTT)= 49s (normal: 29-40s). Which of the following could be the likely diagnosis?