Extreme lower back/tailbone pain?

I am 24 weeks with my second baby and the back pain has not stopped pretty much since my positive test, but the last month or so has been debilitating. I broke my tailbone when I was a kid and have had lasting pain from that so I have no idea if that has anything to do with it, but I did not experience this at all with my first pregnancy. I have a really hard time chasing after my toddler and feel like I can’t be a parent because of it. I can’t be on my feet at work. I’m getting to the point that I can’t make it upstairs at home. I can’t do much of anything. Heat/cold does not help. It’s 2am and I just got up to use the restroom as one does and after limping in there and sitting down, the pain was so bad that it took me several minutes to be able to stand back up. I was worried that I wouldn’t be able to stand back up on my own so I almost woke my husband to help... I’m worried because I still have 16 weeks to go and I’m only going to get bigger and the pain is only going to worsen. Does anyone have any suggestions?