Aw mama, I know how scary that must feel seeing it still there A few of us in our group chat have had similar findings during pregnancy scans, and honestly most resolved on their own or turned out to be nothing serious by delivery, pero I'm glad your OB is sending you for the fetal echo kasi that will give you much clearer answers than the regular ultrasound can. Try not to stress too much in the meantime (I know, easier said than done!), and make sure you ask your cardiologist all your questions during the echo appointment so you know exactly what to expect. Rooting for you and baby!