Normal sciatic pain or back labor?

Laura

Since I cleaned the bathroom yesterday, I've had horrible sciatic pain and it's been a struggle to get around ever since. When I'm sitting I feel okay but once I get up I limp around everywhere. I'm leaning towards this being normal sciatic at the end of pregnancy (I'm 38 + 5) but can anyone who had a previous back labor let me know what they think? Thanks in advance!