Third-trimester back pain

After working full time all week with long commutes, my back is crying. Baby sits high and under my ribs so I feel really off balance.

Came home to do some yoga stretches... and...I'm currently lying on the living room floor and not sure if my back will let me get back up. I'm now waiting for DH to get home in 10 minutes to help. 😓

What has helped you with your back pain?