Sore back

Ma

I'm 21+2 weeks and my lower back is killing me already! Sleeping has become such a problem this past week because my lower back is so sore. I just ordered a pregnancy pillow and will be getting it on Monday so I'm hoping this helps. I'm a FTM so id love some advice on other ways to ease this pain. I know it's only going to get worse from here. Thanks in advance! I'd love to sleep peacefully again (HA), well try atleast.