Hi Brettty
welcome to the forum and the world of type-1..
You need to look at the carbohydrate content of drinks and any foods you eat as you probably have been told by your doc. I never knew what a carbohydrate was until I was diagnosed 21 years ago.
There's diet or low sugar altenatives of most soft drinks, and supermarkets have their own "diet" brands of these.
As for diabetic chocs or other diabetic products, aside from jam 20 years ago, the only useful one I've found is chocolate. But beware of the calories and best to have just as a treat. Boots do quite a lot of diabetic sweets and choclates-bars and boxes, as do Thorntons. I recently discovered Sainsburys "No Added Sugar Milk Chocolate", they also do a dark/plain variety and it's cheaper than other brands at just over a quid for a 100g bar.
I used to swear by sugary chocolate for hypos, but due to the calorific and fat content, generally not a good idea on a regular basis; I put on weight as a result.
A good alternative to drinking water or diet drinks is a small amount of pure fruit juice; orange, pineapple, etc mixed with plenty of fizzy/carbonated water-it's really refreshing and contains no artificial sweeteners or additives.
Hope that helps.
Jus