Great to hear you are looking at options for fiber. We have to be our own best advocate and that is why this site is so helpful to patients.
My husband manages this tummy balance daily. He also has
adhesions that make it more challenging than the chemo he completes, so I don't discount your discomfort one bit. I wanted to share more in case it is helpful. Milk of Magnesia has been his over the counter choice for moving things (metimucil caused cramping for him). He does stool softeners daily as I mentioned, however recently worked with the oncologisy and fluctuate use of Constulose (enulose, lactulose liquid) and Linzess to ensure we don't find ourselves in the ER for blockage. I recommend "bending the ear" of your doctor/surgeon/oncologist (whomever's focus you have) and ensure they know the discomfort and partner for a solution. Keep asking the questions. I apologize for being so verbose. 🙁
🙂 Have a great day!