If you really have to swallow, then go ahead and swallow. The discomfort of having to swallow and not doing it will likely be worse than the swallowing itself. And yes, you shouldn't move.

Dream memory, also known as dream recall, is essential to lucid dreaming. Don't bother WILDing if you don't have good dream recall, or you will likely forget the WILD even if you succeed. We have a tutorial about dream recall, that you might find useful.

If you have any questions, feel free to ask.