Is this PMS or something else?

Shannon

My last period was on January 29th through February 1st. I have regular, normal periods. For this last week? Give or take a few days, I have been having cramping and tingly like cramps/ feelings. Very similar to period cramps as in it’s in the same area but not nearly as intense or as strong. I do get cramps during my period but it’s not normal for me to have them a week or more before my period is due. I have not had my period yet. I took a pg test today and it was neg. from what I could tell. Is this normal? If I was pregnant shouldn’t I have a positive by now?