Kinda worried...

Taryn
I had an ultrasound appt. This past Wednesday and my baby girl is 10th percentile...meaning low for where she's supposed to be at for being 20 weeks and 6 days along. But they had me measuring at 19 weeks and 6 days...but my due date isn't til the 11th or 14th....and according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> I am 20 weeks this past sunday. I'm like so very confused on what week I'm on. Plus this whole low percentile is freaking me out. Doctor said it's nothing to worry about right now. Wondering if anyone had this happen?