Wa'alaikumassalam! Honestly tanda-tanda awal pregnancy kembar dengan single baby tu memang sama je, morning sickness, tired, sore breasts, all that lah. Tapi a few of us mums yang dah pregnant kembar cakap morning sickness mereka lagi teruk and kena scan awal je baru tahu ada dua! The only way to really confirm is ultrasound, sebab hormone levels memang boleh lebih tinggi with twins but it varies from person to person, so tak boleh rely on symptoms alone. Congrats on your pregnancy, hope it goes smoothly!