I found this on the net: The fast-and-dirty temperature check that kind-of works: put one hand on your forehead, and put the other on your chin at the same time. Then swap hands. If your forehead still feels hot, and significantly hotter than your chin, then there's probably something wrong and you should check by using a thermometer.
If you're feeling feverish you probably are.

Drink more water and go to bed.

Feel better soon.