Bad Lower back pain-normal at 40w?

Laura

I am having pretty bad lower back pain to the point where it has me awake and unable to fall back asleep. I haven’t had any back pain all pregnancy. Is this normal? I’m wondering if I should call my dr n the morning? Last night I used a heating pad on low for 30 minutes. Baby is still moving.

I had bad lower back pain during labor my first pregnancy. I’m getting nervous