A friend of mine who went to a sleep centre for her daughter, was shown how to settle her in her own bed. But she was advised that when a child is sick all that goes out the window. I wouldn't worry about a couple of days, just encourage her to go back when she's back to her normal self. I know it can be a little hard in the meantime but it shouldn't be for too much longer if you're not keen on co-sleeping. Hope DD is 100% very soon.