You are evaluating a 16 year-old female in the clinic. Her p…

You are evaluating a 16 year-old female in the clinic. Her parents are concerned because she has been exercising 5 days a week doing aerobics, at her well check her BMI was 18 but her provider thought she “looked good” and was very active. She recently told her mother that she had not had her period in 2 months, and her mother is asking for a pregnancy test. When asked the patient reports she “eats a lot”. She denies inducing emesis. What is the most appropriate diagnosis?