Ah sis, kailangan talaga ng ultrasound para makita kung saan exactly ang placenta mo, hindi mo mararamdaman through normal pregnancy symptoms, kaya yung OB lang ang makakasabi kung high-lying o previa ang sa'yo! A few of us mums actually found out lang during our routine scan na ganyan ang setup namin, kaya don't worry if that's what they found, maraming cases na ganyan at normal lang talaga, lalo na kung nasa upper part lang siya at hindi completely blocking the cervix. Pero best to follow up with your doctor regularly para ma-monitor, especially as you get closer to labor, para ma-ensure safe delivery for you and baby!