Wa'alaikumassalam! Sakit puting masa pregnant memang normal la, especially around your trimester, hormones tengah naik-naik and the whole area becoming more sensitive. A few of my mum friends had the exact same "sharp needle" feeling you're describing, particularly on one side, and it usually passes after a few weeks. Kalau sakit tu terus-menerus or ada discharge or anything unusual, check with your doctor just to be safe, better peace of mind kan. For now, try loose bras, avoid fabric yang rough, and one friend swears by Mama's Choice Nipple Cream , it's pregnancy-safe, soothing, and really helped with the tenderness.