What you suspect can be the case, so please get your sugars done. Even a random reading more than 200 mg/dl will confirm the sugars. Anthing below that and higher than 140 mg/dl, you should then go for HbA1c
tests and Oral Glucose Tolerance Test
Other reasons for these symtpoms can be very high calcium levels in the body. So please make sure you get your calcium profile also done if sugars are fine.
These days, many people with Type 1 diabetes
(old name- Juvenile diabetes
) have strong family history of type 2 diabetes (the one which we see in most of the elder population) and so do not be surprised if your doctor names your diabetes as type 1 diabetes. But fist make sure you have sugars!
I hope you got an idea what to do. All the best.