Hi,
I had a D&C earlier in the year to remove a polyp and had just ovulated 4 days before. I was charting so I noticed the day after my D&C my temps jumped right up quite high all of a sudden. I also had a D&C for a missed miscarriage a few weeks ago and felt like I had a raised temperature for a few days following so I presume it is an affect of the operation. That said, you could have also ovulated as I know sometimes stress/illness can delay or bring it on.
Best of luck to you!