Back discomfort!?

Mama
Hey friends! I'm a FTM and I'm 9 weeks but I'm having the worst time with my back when it comes to sleeping. It bugs and bugs like it needs to pop. I am having to seriously get out of bed in the middle of the night to lay on the floor to get it to feel mildly better. Any tips for stretching or easier sleeping? I had no idea it would be an issue this early on!