Is this normal?

Madelaine

So I'm almost 5 weeks and I have lower back pain like no other. Is this normal? This is my second baby and I did have really bad sciatica with my first but that wasn't until later in my pregnancy. Just nervous as I had MC back in November and just want this baby to stick so bad. I don't really feel like I'm cramping outside of the more normal stretching uterus stuff and no bleeding.