"can marijuana help with my fever, chills and nausea?"
Sorry to hear you are experiencing flu symptoms. First and foremost, if you have (or if you develop) any shortness of breath, you should report immediately to the ER. There is no recommended therapy for seasonal flu in adults other than for symptomatic relief. As with any illness, it is always advised to be sure you are getting adequate water, nutrition, and rest.
Acetaminophen or non-steroidal anti-inflammatory drugs (NSAIDs) may be used to treat fever, headache, and muscle aches due to influenza. Similarly, cannabis has been found to alleviate common flu symptoms. However, cannabis should not be smoked or vaporized, as inhalation may worsen respiratory symptoms.