Hello, My Daughter Is 18 And Has Had Her Cycle

Hello, my daughter is 18 and has had her cycle since she was 14, she started out very irregular but then became regular for the last year or so however she has not had her cycle since December. There is no chance she could be pregnant. She also has woken up with an extreme amount of discharge. She is having no menstrual symptoms at all. What could be causing this?