how to manage the constipation that follows taking opiods/ pain pills after surgery

I have had several surgeries all requiring some type of opiods for pain. I was almost impacted while in rehab and those doctors just don't understand the urgency of giving a stool softener to patients with IBS. I have a back surgery coming up and I am dreading the outcome. Just the thought of trying to push the stool out while trying not to move the back is stressing me out. has anyone had this same dilemma? I did that find out that there is a milder opiod on the stomach called Nucynta. can you give me some advice on what else to do to help? I cannot take Aleve or any ibuprofen, as I had a bleeding ulcer from those meds.