One twin measuring small

Brittany • Married to the love of my life & currently pregnant with fraternal twin girls named Brynlee Marie and Laikyn Rose!
Hey y'all! Today we went to my MFM appointment to check on my di/di twin girls.  I'm 33 weeks tomorrow and my baby A is measuring at only 3 lbs. Baby B is 4 pounds 8 oz. Of course they are watching both babies now every week( saying baby A looks fine.. Just small- she's been this way the whole time) but I can't help but be super worried. Can anyone else relate or have a similar story? I've had no health problems or issues this whole pregnancy too. :/ thanks in advance.