What Is The Severe Pain Along With Dizziness During Periods?

Hello, My name is Sandra Brown and my daughter (13) is on her period. She is in terrible pain and is cries. She also gets dizzy and pale, and gets extremely cold. This is the third time it has happened, but not in the same period. My daughter has had her blood checked, and isn t anemic, so I don t know what it is. Help?