Constipation
Miralax is always a good bet along with adding magnesium oxide over the long term to help keep things a little easier. Pain meds caused constipation for me at the start. Warm fluids and stretching out as much as you can may be helpful at this point too. Early days always a little unpredictable so don't think anything happening now is an indication for or against how things will work in the future. Worst time for me but it settles down.
Pete