Are you sure you don't have type 3C?
I've never heard of T3B, but this is what I could find on it, and what you describe sounds like T3C, not 3B.
Type 3b diabetes
Type 3b is any form of diabetes caused by genetic defects that affect the action of insulin.
Type 3c diabetes
Type 3c diabetes, also known as ‘pancreatogenic diabetes’, is a form of secondary diabetes, that may occur as a result of the pancreatic disorders such as pancreatitis, cystic fibrosis, hemochromatosis, pancreatic cancer, pancreatomy and some neonatal diabetic cases caused by pancreatic agenesis.