Back pain?

Kt

Today around 4:30 pm my low back & hips started aching. It kind of radiated into my butt. I have tried heat (thank goodness for heated car seats 😂) and a hot shower. I am now trying to relax in the recliner. So far nothing has changed it. I can’t tell if it’s coming or going, it feels pretty constant but maybe like every now and then becomes a little more intense. It’s almost 6 pm and I’m just not sure if I should call or if this is a normal thing? I’m 32 weeks 3 days. No pain in tummy. Now consistent tightness in it either.

Side note: I have had sciatica pain before and this doesn’t feel like it?