I'm very exhausted and have a fever of 100.4?

100.4 is not a fever once you have reached such a temperature you are now facing the next step higher, which is Hyperthermia. Hyperthermia is considered very dangerous and does require emergency medical treatment.

Being exhausted could just be a side effect of your Hyperthermia.

You do need to see a doctor right away, if a 24 Hour clinic is not open i do suggest you go straight to the Emergency Room.