Eh yes, this is actually quite common during pregnancy! The swelling and water retention can put pressure on the nerves in your wrist, so the numbness and stiffness you're feeling is pretty normal, happened to me jugak masa pregnant, especially at night. But since it's affecting your movement, definitely check with your doctor or gynae to rule out anything serious and get proper advice, maybe they can suggest some wrist exercises or a support brace to help. In the meantime, try not to keep your wrist in the same position for too long and rest when you can!