Measuring slightly behind

Just had an appointment at 25 weeks at 2 days and baby is measuring 24 weeks and 4 days. So I’m about 5-6 days behind in measurements. Dr said nothing to be concerned about and that it just means she will be a smaller baby. But still can’t help but be paranoid. I should note that both my husband and I are smaller people in general, I’m 5’2 and he’s 5’6, both of us petite as children and now adults. Anyone else measure behind with your current pregnancy or have a previous baby that was measuring behind and all was ok?