Constantly cramping! 5DPO please give opinions💞

I’m either 5 or 6 DPO and I’ve been cramping slightly on my lower left side for about 3/4 days. They don’t hurt but I definitely notice them... “twinges” I guess. But why could I be cramping I’m 8 day’s away from AF. I haven’t been bbt-Ing for too long so I can’t go based of my chart. My temp did dip from being 97.79 yesterday morning to 97.29 this morning. But I took them at slightly different times as I woke up different times. First one at 5:44 am and today at 6:23 am. Anyone have a clue why I’m cramping ??