Back pain causing nausea and cold sweats...

It might be normal at this point in pregnancy. I’m 37 + week’s, and Saturday and a few time today, my back pain gave me the chills, sweats, and made me extremely nauseous. I have a very high pain tolerance usually, but this pregnancy has been really tough on me. Is there anything I can do to help ease this pain? Should I call my doctor if it happens again? Anyone else having issues like this??