Gaining Weight Right Away?

Liz • I'm 31, love traveling, scuba diving, and enjoy doing yoga and sports. Currently expecting our 1st baby on December 24!
So I am 4w5d and have been tracking my weight. I've known I'm pregnant for a week now and according to my scale I've gained 6lbs in a week!
Has anyone else been gaining weight so quickly so early? I always eat healthy and in moderation and that hasn't changed. Just curious is anyone else gained a few pounds early on?