Congrats on the good news. I went through the same crappy anxious waiting game last summer - only I did have cancer (NHL - similar to what John Lester had). 4 months of chemo. I have to confess that it sucked. But I'm fine now.
Anyhow, I really understand what that waiting game is like - honestly, in some ways it's the worst part. As crazy as this sounds, I was relieved when I finally got a diagnosis because it meant I could finally do something about it. I can only imagine how exciting it must be to get a non-cancer diagnosis. Congrats again.