What can cause this back pain?

Any moms struggle with really really bad back pain that radiate to your lower abdomen for no reason? I’m 24 weeks 5 days pregnant and just had a check up checking on baby literally yesterday and she’s been fine and moving just fine. It doesn’t feel like contractions at all coz my belly doesn’t feel hard at all, feels as squishy as usual. We did have a tropical storm come through yesterday, so not sure if the weather changes could impact that, but since we just checked on baby and everything was fine, I don’t wanna overreact and jump to ER for nothing. I took some Tylenol a couple times yesterday and a lidocaine patch yesterday but was just woken up at 230 in the morning with the pain back again. I had mentioned the lower back pain at my high risk appointment yesterday morning, which was irritating but not terrible then so I didn’t think anything of it. But I wasn’t sure if maybe it’s just weather induced or if other mama’s experienced this or not.