I honestly did not understand any of the information but I will read on it. I'm thinking of what you said that the doctor will base my type on the response of my treatment. I really lack information based on everyone's response, I'm kinda feeling frustrated now.
I beg pardon. Let me try again to explain less technically. In your shoes, I would ask for a copy of the report of how the doctor arrived at the diagnosis.
At least 80% of all diabetes cases are of the insulin resistance type, dubbed Type 2. Some signs of T2 are having poor numbers for HDL, blood pressure, triglycerides, and fasting insulin, and being overweight. The more of these factors that are positive, the likelier one is to have T2.
When a person is diagnosed with diabetes, the proper treatment may depend on diagnosing the type correctly. There are at two other varieties of diabetes that often get mistaken for T2: LADA and any out of some gene mutations collectively called MODY. Both LADA and MODY are much more frequent than the medical profession has thought. Some specialists in LADA think it may make up as many as 1 in 10 cases.
Doctors in multiple countries have a tendency to diagnose T2, prescribe metformin, and then observe for a year or two. Because of the 80% figure, this will usually work. Most people with a diagnosis of LADA or MODY were originally misdiagnosed. Metformin tends to produce some lowering of glucose even in cases of misdiagnosis. This of course makes it even trickier to sort things out.
Testing for the MODY mutations is very expensive, so it would not be surprising to see doctors being reluctant to order the tests. The more of these mutations you test for, the higher the cost.
I wonder if the doctor has indeed ruled out "Type 1", the regular diabetes of autoimmunity, which has a rapid onset and urgent need for insulin. In any case, many diagoses of T1 are actually misdiagnosed MODY, but the precise proportion is unknown.
LADA and regular Type 1 are both diseases of autoimmunity. They are caused by autoantibodies. When doctors don't suspect T1, it seems they don't routinely order autoantibody testing. I also don't know whether they routinely test for autoantibodies even when they do suspect T1. Doctors may order a test for just the autoantibody, GADA, but this is insufficient because there are several of them, and many people with autoantibodies do not have GADA specifically.