Aiyooo, cramp perut at 8 weeks memang common, especially if it's just mild pulling sensation, tapi sebab ni first baby and you're worried, better check with your doctor je to be safe, tak perlu nervous, just to confirm everything's progressing properly! A few of my mum friends went through the same thing and the doctor reassured them it was just the uterus stretching, but everyone's different so best get it checked out, okay?