Erichsen competed at the junior level of the 2016 European Championships with Sara Davidsen, Edel Fosse, Julie Soederstroem, and Juliane Toessebro, and the team finished 16th. She made her senior international debut at the 2017 Northern European Championships alongside Ingrid Hafenbrädl, Julie Madsø, Thea Nygaard, and Martine Skregelid where they won the team gold medal.