Ohhh this happened to a few of my mum friends too around 30+ weeks, biasanya carpal tunnel syndrome la jugak sebab water retention yang normal during pregnancy, the swelling puts pressure on the nerves kat wrist tu. Best check with your doctor to confirm and get proper advice, tapi in the meantime try elevating your hands at night, sleep with a wrist splint if possible (pasar malam ada banyak), and massage gently, really helped one of my friends! Jangan worry la, usually settles after delivery, but sebab affecting your sleep better to get it checked out just to be safe.