I've been getting fever and sweats, runny nose for 2 days, should I wait another day before seeing the doctor?

Probably not. If you have a headache and neck stiffness with your other symptoms, you need to see a doctor. If you are coughing and feeling achy all over, you might have the flu in which case you need to be seen if you are getting worse. Otherwise, having these symptoms for only 2 days, it's probably not time yet. Rest, drink fluids, stay home.
Wait 3 days. Your symptoms sounds viral in etiology and can be symptomatically treated with many over the counter and home remedies. Generally, antibiotics for bacterial sinusitis are not indicated unless symptoms worsen after 5 days or last longer than 7-10 days.