Eh, tu memang common lah especially early pregnancy! The cramps boleh jadi dari ligaments stretching atau just hormonal changes, tapi jangan risk je, better check with your doctor to be sure, especially since it's your first baby dan you want peace of mind. A few of my mum friends experienced the same thing around 8 weeks, some turned out fine, tapi some needed checking, jadi best lah go see your gynae just to confirm everything okay.