Wa'alaikumsalam sis! At 29 weeks, those hard, tight feelings (Braxton Hicks contractions) are super normal, tapi kalau dia happening a lot throughout the day and you're worried, best to mention it to your doctor next checkup just to be safe la. A few of us pregnant mummies in my group chat dulu ada the same thing around that time, and it settled down after we drank more water and rested more, sometimes dehydration or being too active can trigger it. If the hardness is painful or accompanied by bleeding or strong cramping, then don't wait, go see your gynae straight away, okay? Take care!