Not sure how far Post-Op you are but this works for me:
1 Drinking all my fluids of course
2 Minimum of 30 gms of fiber per day (Fiber One Cereal with fat free milk, mix in 5 almonds for addl protein and fiber will get you half way there) Dont you DARE sweeten with sugar!
3 Konsyl (sugar free psyllium husk laxative supplement) mixed with a liquid.
If you are too early Post OP forget I mentioned 2 and 3.
Edit: Just noticed your surgery date. You may be too early. I was not on full diet, but getting close at your pouch age.