Thanks for letting us know. I had thought about pancreatitis although it's so hard to actually diagnose.
If that's it's that and you've found a good clinic, hang in there. It can be pretty serious (as you already know) and sometimes it can be the beginnings of chronic pancreatitis.
Here's a pretty good site with vet information- most of the general information is in the middle area:
You all have been on my mind today as I had my graduate advisor get "The Call" from the vet while I was being advised on the phone. We quickly rescheduled and I thought about Annie, you and your husband and all of us who love our furry babies so much and understand that this is part of the commitment we make together.
Sending my best and thank you for keeping us informed,