Pregnancy insomnia

So for the past few nights I always get a back pain that keeps me awake at night! It's on my back side in my rib area it's sooo annoying! It's keeping me up till about 4am & the next day I look like I rose from the dead & I'm just a cranky mess! I have a 4 year old daughter that has been getting a cranky mommy for the past few days & it makes me so sad that any little thing makes me snap at her. I've tried every imaginable position to sleep in, nothing seems to help ☹️