Wa'alaikumassalam sis! Ohhh 37 minggu dah, alhamdulillah dah safe dah kalau lahir sekarang, tapi perut tegang keras dan kencing kerap ni memang typical dekat peringkat ni, saya pun macam tu dulu. A few of my mum friends lahir around 37-38 weeks without drama pun, so it's not unusual, tapi since it's your first baby and you're feeling worried, better check with your OB or midwife just to be sure semuanya okay, especially to confirm dah siap ke or kena tunggu lagi.