Anak, this is really something you need to discuss with your doctor right away, ha, whether it's about a pregnancy ultrasound or your baby's health, kailangan mo talaga ng professional assessment to clarify what happened. A few of us mums have had confusing ultrasound results before, pero the doctors always need to do follow-up checks to make sure, kaya please don't worry alone, go back to your OB or clinic and ask them to explain exactly what they saw, okay? They can do another ultrasound or tests to give you peace of mind. Sending you a hug, sis.