I would personally hold off on the panadol if you can. Panadol can stop fevers which will actually mean you'll be sicker for longer because unless the fever is very high and long lasting they are good for you. Temps above 37 degrees help kill the nasties, and immune cells will double their production in temperatures around 38 degrees.
Vitamin C tablets will help support your immune system, just make sure it's the non-acidic ones otherwise bubs bottom will get sore.
Fengeek tea (which is also good for milk supply) is good for reducing mucus congestion.
Gargle with honey (a big table spoon, don't be stingy) in 1/4 cup of hot water. Honey is antibacterial and will help the sore throat.