This happened to me once and it’s not pretty. I felt like I had to cancel my shows that day but instead I drank a lot of tea and ate lemons like they were apples. In the end I felt better and, as they say, the show must go on 🙂
I’ve actually been sick since last Tuesday with some kind of upper/lower respiratory infection, and what I decided to do was cancel the shows I had scheduled for Wednesday, Thursday, and Friday, since I kept a fever all 3 days. On Friday, the fever broke and didn’t return, so I “went back to work” on Saturday evening. I drank hot apple cider before my first show to help alleviate the hoarseness in my voice and took some medicine to dry up my sinuses. I’m still not 100% but just like someone else pointed out, the show must go on!
I have never cancelled a show before, I usually drink a hot cup of tea and take a hot bubble bath and I feel better afterwards. I find it easy to stay away from colds, I work at home so, during winter,I try to go outside as little as possible.