Is it possible to switch from diabetes type 2 to diabetes 1?

No: The distinction between type 1 & 2 is based on the path genesis of the disease. Type1 generally occurs in childhood, dependent on insulin, frequent complications like dka. Whereas type 2, occurs in later life, usually amenable with oral hypoglycemic agents initially and Insulin later. Type 2 diabetics more often have long term complications, like kidney, heart and other vascular, neurological dise.