Had sinusitis symptoms 4 days now how long should i wait to see if i need antibiotics. i have been using nasal spay and advil to treat?

Difficult question: The clinical diagnosis of acute sinusitis can be challenging.I usually rely more on how sick does the pt appear.Is there a lot of pain in sinus area?This,along with a pus like nasal discharge,fever,swelling,history of prior episodes,risk factors like allergic rhinitis all must be considered.The gold standard test is a CT of the sinuses.Once a diagnosis is made,antibiotics,Afrin nasal spray works.