Wa'alaikumassalam! At 32 weeks, Braxton Hicks contractions (the practice ones) are totally normal, your uterus is just training for labour, so don't worry! But kalau the tightening tu disertai dengan bleeding, discharge yang aneh, or severe pain, better check with your doctor just to be safe, ya. A few of my mum friends also experienced the same thing around 30-something weeks, and semuanya turned out fine, it's just your body preparing. Make sure you rest banyak-banyak, drink plenty of water, and try changing positions if it gets uncomfortable. Wishing you a smooth rest of your pregnancy!