Yep , I too diagnosed in my very early 20's. First off, I survived-and so will she. You will worry constantly, as does my Mum worry over me, and this is 26 years on!!! I certainly get treated differently to my brothers, as I think my Mum feels guilty from giving me bad genes (total nonsense of course).
Your daughter will cope, but I do wish that she had been given the knowledge that I was all those years ago. It is very, very tough nowadays for new type 1's.
My Mum and dad were with me all the time, and my then husband. I still remember my parents clearing out the cupboards before I got home of stuff I couldn't eat (in those days!!!) and Mum always making me foods that I could eat. Nowadays, everything has changed-diabetics are not told to eat diabetic chocloate-but a small piece of normal chocolate etc....
reading posts here will tell you all about how diabetics nowadays find their living better with a lower amount of carbs. It will take a good while for your daughter to work out how different foods affect her. Initally I think hospitals tend to try and keep type 1's out of hypo's. When I was diagnosed I was not allowed to go home from hospital without having a hypo and I was made to run up and down 4 flights of stairs until I did.....(I didn't!!!).
When she has a hypo-(and she will) just remember that you will find it more frightening for you, than she will feel. Often people trying to cope with a hypo find our attacks more stressful than us experiencing them.
Please don't get overwhelmed by the diabetes. Life is for living. She should try and control the diabetes, rather than letting it control her....
There is a huge amount of help here thank goodness....