Sayang, rasa macam tu memang biasa dalam early pregnancy, ligament stretching and uterus growing, plus hormon yang berubah boleh cause cramping on both sides, especially kalau you're active lebih sikit that day. Tapi sebab ni first pregnancy and you're worried, better check with your gynae just to be sure everything's okay, especially kalau the pain gets worse or ada spotting ya. A few of my mum friends had the same worry early on and doc reassured them it was normal, you'll feel so much better once you hear from your doctor yourself!