What do labor contractions feel Like?

This will be my second delivery but with my first I was induced and never really knew what contractions felt like.

I'm 3 days over due and at my last appointment on Wednesday I was about 2 cm dilated and 75 effaced.

I'm having what I think are contractions, they come and go every 8 or so minutes and they can get pretty painful and some make my back hurt bad, they also feel like I have a super full bladder or feels like cramps?

It doesn't help that little girl is moving around which is sorta painful as well..

Does this sound familiar to any of you ladies?

I want a natural labor and delivery so I don't wanna rush to the hospital to soon.