Not sure about the fever side of it but I would get it checked in case of infection. Constipation after a cs is rough. Your local pharmacy will advise ou on what you can take. As for the stingy wee. Does it feel like it hurts right inside ? I had that and it was from whe the catheter had been in. My mum (whi used to be a nurse) said it sounded like they had nicked my bladder a little. Not cut it but just bruised it or something like that. It hurt a lot to pee.