Sayang, cramping dan perut mengeras at 28 weeks boleh jadi Braxton Hicks (false labour), tapi dengan sensasi menyucuk² yang kuat macam tu, kena check with your doctor or go to clinic/hospital today , better safe than sorry especially with that sharp feeling. A few of us mums went in thinking sama je, tapi doc said it's important to rule out anything else at that stage. Please jangan delay, okay?