Dry mouth after being ill?

I recently had a very bad virus. For about two days, I wasn't able to swallow, according to my doctor, I had a viral infection on my upper palate (mouth), which affected my throat which is why I wasn't able to swallow, I am almost better, but I find that in the morning, I awaken often with a very dry mouth and sometimes a bit of a sore throat. What can I do to relieve this dry mouth and the mucous / phlegm in my throat?