Ay normal lang yan, mama! Some of us notice our nails getting darker or may slight discoloration pa during pregnancy, especially towards the end, it's usually just hormones at work and the extra blood flow. Pero if the color change is really sudden, may brown lines, or it looks thick/weird, better check with your OB just to rule out anything else kasi sometimes it can be a sign of something we need to watch, pero most of the time it's just pregnancy things na babalik to normal after delivery!