Ah tu Braxton Hicks lah! Normal je, especially at 34 weeks, perut akan keras then soft balik, macam practice contractions je untuk badan kau menjelang delivery. A few of my mum friends said it happened to them jugak malam-malam, especially kalau sibuk or tired during the day. Tapi kalau sakit teruk, discharge ada, or contractions regular dalam 5-10 minutes apart, better check with your doctor cepat-cepat sebab baru 34 weeks pa lagi.