I have a fever how do i do?

Do what? Please repost with more specifics.

Fever is often a sign of infection. You just have to watch for other associated symptoms and you can have covid test done if you think you are at risk; however, negative test does not rule out the infection though. For fever above 101 and you feel malaise, you can take acetaminophen (Tylenol) 650 mg-1,000 mg every 6-8 hours as needed.

If you are asking what to do to reduce your fever, best answer is to determine the cause and treat the cause. See your General Practitioner.