My daughter she got a low grade fever for two days and body ache for two days. She was also sneezing and having cold. She is using Neildmaid sinus rin

My daughter she got a low grade fever for two days and body ache for two days. She was also sneezing and having cold. She is using Neildmaid sinus rinse three times and a large volume of mucues comes out by using these. she does not feel any congestion. Will sinus infection be cured by using it or may be needed antibiotic. She had sinus two time.