horrible pressure at 35 weeks

Emilie • Mommy of 2 girls and an angel baby. Married to my best friend, & praying for our rainbow baby. 💗
I'm 35 weeks pregnant and for the last three days I have been in unbearable pain in my lower stomach and back due to all the pressure. I can't walk without feeling like my bones are about to break sitting even hurts. This is my third baby and I didn't experience this with my other two pregnancies. Does anyone have any idea of how to bring some relief?