Nako, yan talaga ang confusing part ng pregnancy, ang dating ng baby hindi exact science, hija! A few of us sa group chat namin had the same situation, and honestly, kung ang ultrasound ay May 29, that's usually the more accurate one kasi based sa actual measurements ng baby, so I'd lean towards that date more. But best talaga na iconfirm mo sa doctor mo kung alin ang mas reliable based sa dating scan mo at kung gaano kalaki ang baby ngayon, basta clear lang sa inyo both the center at private clinic kung saan talaga kayo mag-focus. Congratulations on your first baby, mommy!