No - it shouldn't mean that! Back labor happens when your baby is posterior (baby's back is facing your back). This happened with me. He ended up turning at the last second and was born anterior (back facing my front) but for all of my labor he was posterior and so I had back labor. Back pain at the end of pregnancy is just a normal part of all the ways we feel uncomfortable at the end. Take care and congrats on being at the final stretch!