HI
Welcome. I am a type1 and have been for 36yrs, I know cod liver oil is ok, but read the ingredients on the the other items as they may contain glucose/ sugars or even carbohydrates. My son takes creatine so i will look into for you, what is the protein drink you have. Also if you go back to the gym just watch your blood sugars, check before and after exercise as this could lead to sugars becoming low, but don't stop the exercise, it's suppose to make you feel better. I will get back to you on the other stuff.
Take care
Tracey