Aww, worry mo is totally valid kasi pregnancy ultrasounds can have a margin of error, lalo na sa later weeks, a few of us mums experienced the same thing at yan talaga ang sinabi ng docs namin, na it's normal para maging off by a week or two. But honestly, kahit common yan, I'd really suggest bringing this up sa OB mo during your next visit para ma-assess properly kung ano ba talaga ang development ng baby at kung may kailangan i-monitor, better safe than sorry, diba? The good news is you're already 37 weeks, so kahit may slight lag, babawi pa yan ng baby once born, pero let your doctor guide you talaga sa next steps. You're doing great worrying about your little one na!