Contractions or cramping???

Brenda
Been having this pain on the front like cramping but it's super intense. My stomach goes right and then the pain starts it has not really went to my back yet just the front and have a lot of pressure also I'm loosing my mucus plug with a tint of blood . The pain lasts about 40 seconds and then goes away but comes back like every 45 or almost every hour?? What is this ?? I was due yesterday so don't know if I should go to the hospital