Sounds like it. Mine just feel like really bad menstrual back cramps! They usually last for about 15 20 min, and come every 5 min within that time. But the pain stays constant and doesn't progress and usually go away when I lay down and get comfortable
Sounds like BH, mine are similar to menstrual cramps that stretch around to my back or vise-a-versa and i can feel the tightening mine never last now then 2-3 min but are coming more noticeable/stronger as i get closer to my due date, 16 days.
Mine don't hurt, just feels like my stomach is hard all over. And they last for about 15 min each but I have them randomly throughout the day and night. I have no idea what menstrual cramps feel like. I'm just waiting for something regular and painful to know when I am in labor.