it could be early labour same thing happen with me.
My back never really hurt through out my whole pregnancy and just today its killing me. . . :(
You just got to hang in there! I will be 35 weeks tomorrow but recently my back pain has gotten so bad im miserable! I have been waking up 3 or 4 times to pee at night and then can't get back to sleep because of the pain. A few things help like my heating pad and sometimes I use icy hot cream but I keep telling myself once the baby is out my body will go back to normal! Good luck I hope baby comes soon for you
Could be the pressure or back labor in since. I would try and rest and hopefully contractions will start. My back was always sore with my first at the end.