ditto on xthine- I think it would be better to come clean, esp. if you have a particular reason. I would think they might respond a little more favorably if someone actually addressed something like that instead of finding out later when they are ranking people.
I hate thinking board scores are THAT important. To me, they seem so insignificant in the grand scheme of things, especially in psychiatry. Hang in there.
Can you take a couple weeks off now and re-take it? 🙂