Ay, I understand ang worry mo, mama, dating confusion talaga yan sa measurements! Pero this really needs your OB to explain properly, kasi may maraming reasons bakit ganyan ang dating and measurements, and only your doctor can figure out what's happening sa inyo.
A few of us had similar scares, pero turned out okay pag sinundan ng follow-up ultrasound, so please don't panic muna, but do follow up with your doctor agad, ha? That's the safest way to get clarity. Rooting for you!