Hi Dorothy, nice to meet you! Good luck w/ your query.
PD--don't give up, just take a rest for a day or two, it'll come back to you. Do you ever do any sort of writing exercises or prompts? I was skeptical at first about how writing something prompted from a book would help, but they do. It gets you thinking and once the brain gets going, it's easier to jump back into the WIP.
misslissy--YAWN is YA Write Now. Kind of like a write or die, word war, etc. Someone designates when to start (usually on the :00 or :30) and then you write for an hour. At the end of the hour, we post a snippet of what we wrote (usually ~500ish words). Then read what everyone else posted and give a little crit or comment via rep points. Then delete your snip. It's another kind of exercise/prompt to get you writing. If you're a deadline motivated person, it works quite well.