Mix 1 tsp. table salt with 8 oz. of warm water and gargle with it (don't swallow! ). My DH swears by this for a sore throat. I, OTOH, have never been able to manage it because gargling anything makes me gag. I take Ibuprofen (Motrin) for the sore throat, sugar free cough drops and Robitussin liquigels or Diabetic Tussin (sugar-free). Lots of people hate the smell of this, but Vicks vaporub cream does wonders for a cough and helps with the congestion as well; just wear a loose shirt or top while you have it on (I usually only put it on at night before bed when I need to use it).
Hope you feel better soon!