My 16 year old daughter's normal period is very light and lasts 2 days. This month however, she started yesterday morning and it was very heavy with clots and today it is heavy with clots as well. She has bad cramps in abdominal, pelvic area, as well as sharp pain down low in her vaginal area. Not sure if the next bit of info is related or not, but she has also had a stomach ache and felt nauseous with a lot of burping off and on for the last 7 days, well before any period symptoms even began. Do I need to just keep an eye on her or do I need to take her in to be seen?