Ay alam ko yan sobrang worry-inducing lalo na first time mom ka pa, pero tiwala lang sa doc mo dahil yan talaga ang standard advice, most of the time it's just a benign finding na nawala na lang. A few of us in our moms' group had the same thing flagged during ultrasound kaya hindi ka nag-iisa, and honestly after the next scan it was gone na, so respire lang muna until your OB visit on the 26th. Google is really not our friend dito because it jumps straight to the scary stuff, pero ang totoo kung concerned ka pa rin after your appointment, don't hesitate to ask your doc directly para mas malinaw ang explanation, mine was super reassuring pag detailed na ang convo. Fingers crossed for you and baby!