Sayang, sakit perut lepas makan ubat iron memang boleh jadi, tapi sebab you're 33 weeks, please check with your doctor or midwife dulu sebelum teruskan atau tukar ubat, okay? They need to know the timing and how bad it is. A few of my mum friends ada yang tak tahan with certain iron supplements, but your doc boleh adjust atau recommend something gentler for you at this stage. Jangan tahan-tahan, sebab iron penting untuk pregnancy, better to find the right option with their help!