The symptoms you describe are very similar to those articulated by these two CoV patients who were aboard the Diamond Princess cruise ship which docked in Japan.

Here is their vlog on youtube. https://www.youtube.com/watch?v=H2E1t3yMXgE

The husband describes his experience with temperature and thermometers in the first 5 minutes. The similarity to your symptoms begins at ~ 5:00.

This whole video is worth an investment of 38 minutes. 5M+ views.