I have the flu and bronchitis to go with or some type of lung infection?

hey Im pretty certain I have the flu and bronchitis to go with or some type of lung infection I’m taking niocitran my question is do I need to go see a doctors to get a prescription for antibiotics or will the niocitran do its job iv never taken it before as I live in Australia and not sure we even have it there, I’m over sees atm so not sure what to do cheers for the help

Age: 21
Male
Medications: niocitran
No
General Information: cough, trouble breathing, headaces, sore overall body feeling sluggish