Baby weight gain?

Samantha
I had an appointment with an ultra sound tech today, my son has been very difficult with showing himself so I've had three appointments to finally see everything. I'm close to 29 weeks, just two days shy. They tell me he's ok, however he's in the 89 presential in weight and is 3lbs and 7oz. And their concerned he's going to get to big. So they are having me come back in 6 weeks to check his weight. My daughter was a large baby so I never was alerted or given any worry. But this time around hearing this news bothers me. Just was needing some input on this.