Honestly, hindi ko pa narinig na nagbabago ang nipples towards inverted during pregnancy itself, usually they actually become more pronounced dahil sa hormones at swelling, so that's good news for you! Basta start na ngayon with nipple exercises or shields kung gusto mo prepare (a few of us did this from around 30 weeks just to be safe), pero since normal pa sila ngayon, chances are okay ka lang by delivery. Best to run this by your OB though, especially closer to your due date, they can assess if anything changes and give you specific tips for breastfeeding prep based on how your nipples look by then, kasi bawat mama is different. Wishing you all the best sa breastfeeding journey mo!