How are some ways YOU can tell if you have Type 1 Diabetes?

Lately i have been showing the symptoms for type 1 diabetes, and it has been going on this last month.
But my question is for people who have been diagnosed with type 1 diabetes, What was it like when you first thought you had this decease? How did you feel at the time and what were some of the big signs that you had it? PLEASE BE VERY DETAILED

Thank you very much.