Hai hun! Round ligament pain tu common je masa pregnant, especially around 5 bulan when baby's growing fast, rasa macam sharp atau pulling sensation kat bawah perut, especially when you stand up or bergerak suddenly. A few of my mum friends went through the same thing, but better check with your doctor to make sure it's nothing else lah, just to be safe! Kalau ada dengung2 atau dizziness sekali, definitely kena mention to your doc as well ye.