Eh, kalau perut keras tu memang normal la during pregnancy, tapi it's hard to say mana baby's position just from that feeling alone! Some of my mum friends said mereka rasa keras kat different spots depending on baby's position that week, bontot usually terasa bulat and hard, kepala pun keras but more rounded juga. Best approach is ask your doctor or midwife la, especially if this is your first time, sebab dorang boleh confirm with palpation where exactly baby is positioned