Out of boredom and curiosity I decided to take my oral temperature every 20 minutes as I go about my day, and so far my temperature has dipped and drifted from a near-hypothermic 96.2 to a low fever of 99.7 and back.

I just had a tetanus shot after receiving a deep wound on my arm that I didn't get to a doctor in time to have sutured(the wound is clean and probably not infected), and I've been feeling pretty lousy all day. Could this explain it?