I know thats a scary number BUT it isn't uncommon for post op and with the margin of error of the stupid digital thermometers out there I can understand the blasé response from the doc, a little bit. What he should have done is explain that your body is doing what it thinks it is supposed to do and that it is very common after surgery- keep an eye on it and call back if it continues or rises.I am one day post op and have a fever of 102.8.
I get it entirely, my wife just had a major surgery (hip replacement) and when I saw a high temp I called and asked if she should get a covid test out of an abundance of caution. Same reply but he also said he gets calls like this after almost every surgery now, at least people are watching their temps!
I know in my own case I have had temps and night sweats for weeks after surgeries, and I was told it is actually opiate withdrawals. if you were blasted with any of the super op's out there now like the fentanyl and Dilaudid like I was, the whole system is deregulated for awhile. Best thoughts out to you