Hi dear, I had Carpel tunnel in both arms in late late pregnancy. It started in my left hand but right hand had it too. I had numbness and stiffness and pain in my finger joints. I usually couldn't clench my fists when I wake up. I slept on both left and right. More on my right as I also had sciatica on my left. I did flexing/ rotating of my wrists, clenching of my fists and elevate my arms above my head in the morning to relieve the discomfort. I've asked, it's usually caused by fluid retention and the small carpel tunnel nerve gets squashed. My symptoms largely went away immediately post delivery but only full cleared by week 5 pp.
https://sg.theasianparent.com/carpal-tunnel-syndrome-during-pregnancy