cramping

Got some strange cramping happenig it's happened about twice but there not mild they kinda remind you of period cramps but a little milder then that. I don't know how many DPO Ian because I didn't take any test this month but this is a new symptom does anyone know what it could be. AF  isn't due until the for another 11 days I don't cramp early for her until the first day of bleeding.