Oh so sorry to hear about your poor little baby.
For sure can you post your lab work numbers? That will help many of us here to try and help and give you perhaps some advice.
We thought Izzy had Addison's but turned out she has SIBO/IBD which triggers pancreatitis sometimes. We finally after almost losing her 4 times and tons of tests that she had SIBO which triggered everything else.
She is on a special diet, Tylan and supplements. We have also consulted with a pet nutritionist out in California.
Keep us posted. Hang in there..I know what you are going through. Izzy was almost 2 when this started last November.