My girlfriend and I were worried she might be pregnant, but her period has started. However, she says it started lighter than usual. It also started a day early. Now, she says it is a normal color, flow, etc. And everthing is normal. She says, though, that her cramps are worse than ever before. That being said, she usually has pretty bad cramps. Is that all it is, or is there a chance she is pregnant, even though shes on her period?