Aih, I can imagine you're getting anxious now lah at 39 weeks! The back pain with the hardening could be early labour signs, tapi sometimes it's just Braxton-Hicks yang confusing je, kalau contractions are irregular and go away when you move around or rest, usually false alarm. A few of us went through the same thing and ended up going past 40 weeks, so you're not alone! I'd honestly suggest call your midwife or doctor soon and describe exactly what you're feeling (the timing of contractions, how long they last, the back pain) so they can assess whether it's the real deal or not, they'll also advise whether induction is needed based on your situation. The good news is your body is clearly preparing, jadi InsyaAllah babamu will come when ready lah