A 5 year old male child presents with continuous bleeding from mouth. He had h/o fall early in the morning while playing. No h/o bruising or hematoma. He is taking amoxycillin for his middle ear infection. O/E he is stable and there is a small laceration in the lower lip with oozing of blood. Hb 12.8g%, hematocrit 35.4%, WBC count 8400/mm3, Platelets 300 X 109/L- Prothrombin time 11.5 seconds, aPTT 37.2 seconds. Diagnosis