35+6 weeks

Had my Dr apt to check on how things are going last week I was 2cm dilated and 0% effaced now this week I'm 2 1/2cm dilated and 50% effaced my Dr gave me an guess of when I'll be ready to deliver my baby she said at the most 2 weeks but she doubts it the baby has been in head down really low position for birth since about 33 weeks and I'm having contractions but don't feel anything just my back hurts more and more as the days pass I told her and she said. I'm having back labor with back labor it's normal not to feel anything in my stomach isn't It a lil soon for me to be having so many labor pains? I'll be 36 weeks tomorrow it's still a month away from my due date wouldn't that mean my baby will be premature?