Eh normal je, especially at 28 weeks when baby dah besar and your body dah shift banyak, the ligaments stretching and joints moving lagi flexible sebab hormones, so ada bunyi2 itu common. That said, if it comes with sakit yang sharp or you rasa ada yang pulled, better check with your gynae just to be safe, takkan rugi kan, banyak mums experience ini tapi takde harm checking in.