Aah placenta previa ke, memang ada mommies yang kena ni especially kalau dah ada baby sebelum ni! Most of the time placenta ni akan gerak naik sendiri by 32-34 weeks as the uterus stretches, so ada harapan lagi, tapi memang kena monitor closely dengan doc sebab timing je yang jadi concern at 29 weeks. Rest punya yang maksimum (especially avoid heavy lifting lah since you have another kid), pelvic rest if your doctor advise, and jangan panic dulu, banyak cases yang resolve on their own before delivery. Have you had a follow-up scan booked already with your OB?