Most will take a stool softener after surgery to help and if the Constipation sets in the doctor will suggest Miralax. Let the doctor's office know you are having this problem ASAP.
Like you, I've been on WW for several years and I lost weight on it, but I couldn't keep it off and, like you, that's why I had the surgery. WW isn't a diet, its just a way of eating healthy and if you go over your points for the day - well, you have extra weekly points you can use, so you don't have to feel guilty. And aside from a very few things, you can eat pretty much what you like (in moderation). I cook with WW recipes a lot, and my husband usually can't tell the difference (except for the eggplant lasagna! LOL!) Just like the band, WW is a tool to help you meet your goals.
And for those of you who DON'T want to go to meetings (which I don't), you can just do the WW online. You can keep your journal there, they have great recipes and exercise tips, and you always have the support here if you need a boost.
I'm SO glad there are others doing WW!
