How did you know it was labor ?

Joy

I'll be turning 39 weeks tomorrow & I went to Labor & Delivery on Wednesday and I was not dilated . From 12 am to about 3 am I had consistent pains to the point I would have to sit up because that made the pain a little bit more tolerable. I've never experienced real contractions before so I don't know exactly know how they feel but I'd swear these were the real one's but since I already have two kids at home I would hate to have to leave me babies again to go get checked & nothing. The pain was on the bottom of my stomach under my belly button & my lower back. I also had a very small amount of bleeding . Has anyone experienced this & been dilated ?