Can anxiety cause me to have a mild fever off and on with fatigue that is off and on for the last 3 weeks? I have been stressing a lot lately of something I did that was very terrible and have not been feeling well. I'm hoping its because of this and not something else. I feel guilty, depressed, anxiety, and stressed. I am also stressed of what other medical things this could be if its not the anxiety causing it. If that's relevant. Thanks for your feedback on this.