Pregnancy weight gain

Almost to 6 weeks and have not gained Any weight but am concerned. Two years ago I lost 30 lb through the Weight Watchers program and have been a follower of it even after hitting and maintaining my goal for 2 years. Trying to not gain too much, but also not obsess. Food addiction has been a real struggle for me so I am weary. Does anyone weigh weekly at home while pregnant or will it just make me crazy?