If you feel like you’ve eaten too much sugar, drink plenty of water. Like a pint or so, not loads over a long time but a decent amount to literally water down the sugar. Water is also used in many of the biochemical processes so it helps metabolism.

If you’ve been tested and it’s come back negative, then you’re not diabetic. That doesn’t mean you can’t become diabetic later in life, but you’re not going to be needing insulin shots or anything like that.