Hi Nino and welcome.
As Andy HB has said, you have done yourself a favour with your "fitness health route" - at least it's postponed diagnosis (if that's what the surgery is going to tell you), plus diet and exercise are essential parts of managing any form of diabetes. Sure, you might need some medication (almost certainly tablets initially, and perhaps never any injections), but (as Steff says) it's not the end of the world, plus if you do need diabetes medication, you will get a free prescription card, so you won't have to pay for them.