that would be a reasonable course of action. sinusitis can be a bit tricky to treat and often one course of antibiotics may not do it. in light of the fact that you are still having facial pain (and pressure? ) and are still congested and coughing you may need further care -- perhaps a stronger or different antibiotic (assuming you had an antibiotic the first round) and something more to control your symptoms.
i was just treated for a sinus infection but still feel bad- do i head back to the doc? . i finished all the medication as prescribed but am still congested coughing and have face pain