Salam! Perut terasa cekang tu quite normal sis, especially bila berdiri lama, uterus tengah stretch dan ligaments pulling, so memang ada feeling macam tarik-tarik gitu. A few of my mum friends juga cakap sama ada second pregnancy, maybe sebab body dah tahu apa yang nak happen so rasa macam berbeza dari first time. But just nak be safe, kalo rasa macam sakit teruk or ada bleeding, better check with your doctor cepat-cepat okay? Congratulations on your second pregnancy!