FTM: Back Pain

Okay, so, I'm currently 16 weeks and I'm carrying low so I've been getting some MAJOR back pain. It's to the point where if I'm walking it'll be hurting already, but it can get really sharp to where I'll almost collapse. Is this normal? I was thinking it could be much more intense because I use to have the WORST habit of popping my back and now it's uncomfortable to even try so I just stopped altogether. Feel free to give me some helpful advice! I'd really appreciate it and thank you in advance.