Sore Throat and Bad Cough.

I coughed so much last night that I had a sore and raw feeling throat all the day. It didn't stop me from talking and my voice didn't become high-pitched. But it feels bad enough to give me premonitions of things worsening. One of my colleagues at work who had the cold earlier than me has told me of a similar experience. He had a coughing episode in the middle of the night and suffered a sore throat the rest of the day. He also ended up losing his voice which has me worried. I need my voice; I can't afford to lose it. So I hope the medicine, which my wife is swearing by and I am now taking, works