Hello everyone, I've been having trouble with my hands for a month now…

Hello everyone, I've been having trouble with my hands for a month now, both day and night, and it hasn't gotten any better. I'm 38 years old, this is my third pregnancy, and I feel awful. My back hurts, it's sore and just won't stop. It feels like my lower back is really heavy, and I can barely walk. I don't know what's wrong, it's just terrible! ??? I can't even lift my leg, and I can't move much. They say it's probably my sciatica too.