Anak, I know how scary this feels pero please go to your OB as soon as possible , hindi ka dapat mag-alala mag-isa about this. This is something they need to check closely, especially with twins. A few of us moms have been through uncertain scans din, and honestly, only your doctor can tell you what's really happening. Walang online advice na makakasagot dito properly. Please don't wait, ha? Your peace of mind matters, at kailangan mo ng proper monitoring talaga. Ingat ka!