PP weight loss

Bailey
So I’m a little over a week PP and I weighed myself for the first time. My son was 9lb 8oz and last time I was weighed I was 190lbs and today I weighed in at 161lbs! I’m super happy but is it normal to lose that much in just a week? I’m so happy to be only 10lbs away from my pregnancy weight which was 150❤️