Ay, numbness sa fingertips ay common sa late pregnancy dahil sa swelling at pressure sa nerves, pero 31 weeks pa lang kaya better safe than sorry, mention mo ito sa OB mo next checkup talaga, lalo na kung umiiral lang recently. A few of my mum friends experienced something similar and it went away after delivery, pero iba-iba talaga, so best to get it checked para peace of mind mo at ruled out ang carpal tunnel or other stuff.