Ah, knee pain during pregnancy tu memang common! A few of my mum friends complained about it jugak, especially towards the end of their pregnancy because of the extra weight and hormones yang buat ligaments jadi loose. Boleh je pergi klinik swasta, doktor boleh check and give you safe exercises or maybe recommend a support belt, tapi best jugak mention to your gynae at the same time so dia tahu. Try to rest when you can, avoid heels, and some of us found that staying in warm water or gentle stretching helped lah. Kalau sakit tu terus membengkak or tak boleh gerak sama sekali, don't wait lah, go see the doctor soon.