Cramping Possibilities

MJ
Ladies,
I was just wondering what you thought. We have been ttc and haven't been able too, yet. My period isn't supposed to start until the sixth but I have been have some slight cramping the last two days in my lower tummy area. Since my period doesn't start until the 6th assuming that It's too early to test? Or should I test now? Is there a possibility this could be related to preganancy?