I have recently stopped smoking (4 days ago) after 9 months. The first day after quitting, I started to suffer from rather bad pains in my chest and back, which went the following day but then came down with a cold and then began to lose my voice. Tonight, I was rehearsing for a show I am taking part in (which starts next week) and during, I had to shout at the top of my voice and it's made my voice go worse. I have gurgled salt and water, eaten a packet of Soothers, drank tea and rested my voice but it's still not working. It's making me feel quite depressed as I am a vocalist. What do I have to do?