Baby not growing?

I had an ultrasound on Monday 10/14 and started bleeding due to a hemorrhage on Friday 10/18 at 8weeks and 5 days. So I had another ultrasound that day to measure and check viability of baby. Baby still had a strong heart beat, but did not grow in size since Monday. Is this something to worry about? I know it’s a four day difference, but shouldn’t baby grow at least a little? I’m so worried that I’ve been thinking about it everyday. And I’m already so eager for my next ultrasound hoping that baby has grown and everything is okay. 😞