I've been a Type 1 diabetic for most of my life. I was diagnosed at the tender age of 3. I've had many problems with it, going in and out of diabetic ketoacidosis many, many times, and I'm not suffering the consequences of that.
You will never catch me using my illness as an excuse. If I ever mention my blood sugars or insulin or other such things, I'm either being serious or joking. I don't use diabetes as a means of getting out of things.
I also don't use it to ask for pity.
It irritates me to no end when people use their illness for sympathy and a means of escape.
If I can deal with this, so can you. Suck it up, put on a smile and show what you can do.