Sayang, perut sakit macam tu boleh jadi banyak bab, biasa, tapi kena perhatikan la. Please go see your doctor or nearest clinic ASAP to check properly, especially kalau sakit terus-terusan atau ada symptoms lain. A few of us mums dalam group ada experience mcm ni, some kena gastric, ada pulak period pain atau constipation. But the thing is, only doctor boleh tengok properly and tell you what's really going on. Jangan delay, better safe than sorry kan? Perut tu complicated, so please get checked out, babe.