Weight watchers while pregnant

Lindsey
Hey Ladies! Have any of y'all been on weight watchers while pregnant? I know the doctors don't want you to lose weight but I think it would be a good way to keep myself accountable for what I'm eating, when I do get pregnant. I'm already very overweight, but I have been using weight watchers for the past few months and have lost 20 lbs! Thanks in advance for any opinions! :)