My pouch test

So I've been thinking a lot and I'm so scared I stretch my pouch after my last pregnancy with my daughter paisley. I had gastric bypass on feb 1, 2008 it was 5 years ago. I was 220lbs and I went down to 115lbs ill never be that heavy again. So I did alittle research and I need to do a 5 day pouch test to make sure I didn't stretch my pouch and to help it work again. Tomorrow I can eat clear broth and jello. I have to drink at least 64oz water. I can do it. I hope