Could The Mild Nausea And Nasal Congestion Be Caused By Z-pack?

My breath has been described as "funny smelling" by my girlfriend for several days now and I have also had mild nausea during that time. still have appetite and can eat with out change. I do have a strange taste in my mouth also. This occurred or started after I had a tough bout with a cold/bacetrial infection (7 days soar throat, followed by 10+ days of intense nasal congestion at which time I got meds) and was treated with a Z-pack after which symptoms slowly decreased and now I have this. I am 25, 6'2" 185 lbs, with no major past medical history.