It could be a bit of pre labour! Especially if you have had the mucous plug. It can go on for a while though so it's not always a sign that labour is imminent.

I know it's frustrating when you don't know what's going on Try to keep yourself busy to keep your mind off the discomfort.

Have you tried going for a walk? Gentle excercise can get things moving if it is almost time. I always feel a bit invigorated after a stroll anyway so it might be a good way to clear your head.