One last question how does the doctor know if a patient has type 1 or type 2 diabetes?
Type 1 and type 2 diabetes are two entirely different conditions. Type 1 is an autoimmune disease where the immune system gets bored/over enthusiastic and kills off the insulin producing beta cells. Type 2 is a condition of insulin resistance where the cells don't react properly to the available insulin and can't use it to get sugar into the cells, it often comes along with hyperinsulimia, the over production of insulin in contrast to type 1s who can't produce any insulin.
Type 2 often comes with age (over 50 or younger for south Asian ethnicities) or excess weight, and you have said you are dieting
Also im overweight which means i have to lose weight first and also accompany that with a healthy diet.
Type 2 often doesn't come with symptoms and you went to the doctor for a blood test for something else which showed high sugars. In contrast type 1 is an acute onset condition with sudden symptoms on excess thirst, excess urination, tiredness and weight loss.
Type 1 is usually diagnosed with sugars over 20/30mmol/l. You were diagnosed with blood sugars of 130mg/dL, which is 7.2 mmol/l. Type 1 is often diagnosed with ketones, caused by a lack of insulin, which are less common in type 2 diabetes where the patient is likely to be making more insulin than normal