I don't know; I've lost my thermometer :-/
Can you tell me more about what sort of infection it might be? (If that's what is.) I used to get a lot of fevers with my Crohn's, but as far as I know, it was just the Crohn's causing them - if I had any infection, it was never discovered.
All infections cause the same general feeling of being unwell: I'd feel sick, couldn't face food, felt shivery and hot and cold, general malaise and wanted to lie down all the time. But they have all been treated so easily and quickly with antibiotics, I'd go from feeling terrible to feeling ok in a week or less. You can get UTIs, especially if you had a catheter in hospital, which can lead to kidney infection. You can get an infection at the site of the incision, and the area may go hard, feel warm to the touch, red, itchy, and the wound may ooze pus. And you can get internal infections of the bowel which have no specific signs revealing where they are, you just get all the general feelings of being unwell.
It's not been all that long since your surgery, I don't think you should give up hope of a good result yet. I had ileus after my original stoma surgery, and even after healing from the surgery, I felt wiped out because I'd not eaten properly in so long, it was several weeks before I began to get any energy back at all.
I think you should tell a doctor how you're feeling. There are many complications that can arise from surgery but so many of them are easily treated. Infections can be diagnosed with a blood test.
Also, is it possible you're still in withdrawal from any meds?