I had the same issue post-op. I finally called the Doctor on day 7. The told me that it is not OK to not have gone to the bathroom, and to take MoM. It worked. I would recommend taking a tablespoon of that before you are in pain from not going. We still have waste even if we are on liquids.
I also agree with what Kelly is saying ... but I think the timing is what is important here. We are not talking about day to day life. This is post op. Kelly is 3 months out. My wife wasn't allowed to leave the hospital after her c-section until she had a BM, which is a very common practice after general anesthetic. The OP was taking in fluids for 2 weeks before surgery, as was I. I remember how my first BM was after my sleeve surgery, which was 5 days and with MOM. I thought I was going to have an aneurism. Not kidding. And I didn't eat a thing the day before my surgery and drank a TON of liquids. I took some more and everything balanced out. Abusing anything will bring problems, including laxatives. Don't freak the OP out. You can take a dose of MOM and see what happens. I'm guessing the chances of you becoming a MOM junkie are pretty slim. I know I made it through. No reason to suffer.