Should i go to the er? mild fever 5 days chest and sinus congestion, deep cough and wheezing. lightheaded with headache and body aches

Primary Care: Your primary care provider is likely a better choice for non life-threatening illness. ER doctors are trained to work quickly and efficiently in situations where the patient's life is at risk, so you are more likely to be exposed to tests that involve radiation or risk of false-positive results. Of course if you are struggling to breath, the ER is appropriate.