Aiyah jangan risau sangat, at 37 weeks ada banyak time lagi untuk baby's head to engage, some babies engage quite late, especially first time mums. Kawan saya anak pertama baru engage at 39 weeks and labour went smoothly je, so not uncommon lah, but best lah to check with your doctor regularly and make sure baby is in good position, maybe try walking, squats, or positions yang doctor suggest untuk encourage engagement.