Woohoo, when did this topic appear?
Type 1 diabetes is an autoimmune disease that can strike anyone at any age at any time. It can land you in intensive care in a matter of days. The symptoms are being exhausted, so thirsty you could drink a lake and come back for more, getting thin, and weeing constantly.
If you're worried, get to a GP, fast, and insist they do a blood sugar test there and then.
(That was my public service announcement for the day, in honour of the new Diabetes topic that I've just spotted).