Teen daughter srange period

Lady • 🏃‍♂️19🏃‍♀️18🏃‍♀️15🏃‍♀️14

Hey, so my daughter is 15 and has a fairly heavy and regular flow but she came to me this time worried cuz it was clearish and mucousy and thicker than normal. Any ideas? Should we go to a doc? Shes not sexually active