Confuse

Hi I really need some help I am 8DPO but I keep feeling some cramps for a few days now it's very uncomfortable and my period is not due until the next 6 days, just to let you know I never had any kind of pains or cramping before my period, it's always normal  what should I do because am worried and scared that it's going to be bad news, and yes am trying to get pregnant for a few months now and nothing happen! I would really like some answer about what to do about the cramps that am feeling in my lower tummy???