Preemie clothes?

I’m high risk for restricted fetal growth and at my 28-week scan my baby was in the 21st percentile. Do you think I should buy some preemie clothes, just in case? My son was only in newborn clothes for 2 weeks, despite weighing just over 7lb at birth, and there’s no way he would have fit in preemie clothes, but this time I’m having a girl and she’s been measuring about a week behind at all of my scans.

If you think I should buy preemie clothes, do you have any suggestions for brands? Thank you so much!