Many many many people I talked to said they've had shortness of breath and pain in the abdomen for a while after surgery. Like 4 weeks sometimes. I had back pain for about a week and the abdomen pain was off and on. Worse in the evenings. Better in the morning. It takes time.
I know my hospital gave me a tummy pillow and a breathing thing I sucked into for 15 seconds to help my lungs to prevent post op pneumonia.